With all due respect, please keep in mind that one in a dozen is about 8.333%, which is still an incredibly high rate of product failure when push comes to shove. I mean if over 8% of airplanes failed then you certainly wouldn't be in a rush to fly anytime soon, right? Heck, even an airplane failure rate of 1%-2% would probably be more than enough to cause the entire commercial airline industry to vanish almost overnight.
And numerous people have literally opened brand new Kem cards only to discover that they are already bowed or warped. I had that exact same experience with one of the decks in my Modiano Platinum setup. So if new-in-box cards from multiple brands are bowing before ever even making it to a consumer then it isn't simply an issue of longevity or quality control. It is that, despite making cards that feel "buttery soft" and velvety, cellulose acetate itself seems to not be an ideal material for playing cards. For whatever reason it results in cards that are often either too brittle or prone to warping.
This is further evidenced by the number of companies that have tried - and failed - at making cellulose acetate cards. Remember that Dal Negro gave it a shot a while back on their "Freedom" line but gave up on it, and Modiano actually discontinued their Platinum line years ago. The Guild card line was the result of a Kickstarter campaign back in 2014 by Liberty Playing Cards/Playingcards.net/Gambler’s Warehouse (which are apparently all the same company out of Grand Prairie, Texas) to make cellulose acetate cards. And although they are still around they certainly never took off in terms of popularity. Truth be told, we don't even know for sure if Guild cards are actually still being produced or not... maybe they are simply selling off their existing old stock (like we see with Modiano Platinums). And the Angel Group reserves cellulose acetate strictly for their "Angel Playing Cards Co., Ltd." setups in the green box, which are basically only sold in Japan and have extremely limited distribution. So the only brand that has ever actually seen any semblance of success marketing cellulose acetate playing cards is Kem... and their struggles over the years have been documented by PCF members ad nauseam.
All in all, everybody is welcome to their own opinions of course. But, at least to me, the history of cellulose acetate in playing cards hardly seems like any indicator of a "best in class" material. Maybe someone will eventually invent methods to minimize its deficiencies at some point, but until then acetate cards remain more of a novelty than a gold-standard. But that's just my $0.02!
Bikishu,
I don't have much of a problem with our empirical failure rate of 8.33%.
Why? Because, as I said these cards are better than practically any other if you don't look at price. And if we agree on 8.33% being bad, then converse of that is over 90% of the time these are superior to COPAGs and almost any other PVC deck.
(OK, maybe not the Dal Negro Freedom X's which I cherish, but as you point out they are unobtanium now and others say Fourniers, to which I would grudgingly agree, after which I would say that while maybe not unobtainable, are darn hard to find in the US, much less to a guy in the Philippines)
I also have a deck of Angel acetates. They warped rather quickly. I notice that all Bridge size decks, whether Cellulose or PVC will bow faster than poker size, kind of makes sense, I guess.
I agree with you regarding the KEMs. I really am not going to buy another setup. Perhaps I am lucky but I've never opened a Modiano Platinum setup "pre-warped" so to speak. I would thus submit that Modiano has had equal or better luck marketing them. The mere fact that so many of us are looking for them is an indicator of that.
From experience living in the tropics, I would share with you what I consider best practices though - Storing plastic cards in the 2 card setup box is not ideal, especially for acetates. Once I open them I get old Bicycle single-deck boxes and store them there. I also store all my decks in a sealed container with a few dessicant gel packs.
For unopened decks I store them in a box with several dessicant containers as well.
I strongly feel humidity is the enemy here.
I understand where you are coming from when you say Acetates are a novelty, or perhaps an obsolete technology considering how long its been around. I would point out though that it's quite probable that these different manufacturers probably have different methods and formulation and suppliers for their raw materials, so while you are probably right that Acetates have a bowing issue, you probably will get different results with different brands, sizes and even atmospherics.
However, I deal in maybe half of the games I play and I value decks that shuffle well and softly, that glide well and last a reasonably long time. I take lots of Vitamin B complex to avoid finger joint pain that's come around in the last few years (I strongly recommend it. It really works).
If I had a dealer for all my games I would buy some cheap China PVC cards and replace them with a brand new one every single time one of the players is on a losing streak and asks for a change in deck =)
I would suggest though if you want a good feeling deck for less money, you may want to try Desjgn decks. They tick all the boxes and I consider them the best value cards all around.