I agree with ya.I dunno, I’d 100% rather play fixed limit than playing spread limit or no limit with a cap - I’d rather play a different game than some weird compromise. Of course, I’ve never tried spread limit or no limit with a cap, but they just seem like terrible compromises.
Spread limit is basically limit with a "bigger" bet cap, which essentially gets bet the max amount every time -- I've never played anywhere when it wasn't (in a 1/2/5 spread-limit game, for example, every bet made is $5, although it ~could~ be from $2 to $5). It's basically pointless; just raise the limit stakes instead.
Same for pot-limit. Most (all?) PL games have no or very little bet sizing strategy involved; people just bet the maximum (pot). NL games usually play smaller irl than PL for this reason - what is designed to limit the size of the game actually makes it bigger.
No-limit with a cap works to some degree, but I personally find it distasteful. It ~should~ alter betting strategy earlier in the hand to allow meaningful betting later when the cap affects betting size..... but it doesn't. So players end up hog-tied in post-flop betting with bloated pots they can't attack or defend.
Hold'em is best played fixed-limit or no-limit -- but they are very different games.