wait a minute. is it "strip" or "box"?
If you strip off in four packets, or you box the deck in four packets, you've done the exact same thing to the cards - but the mechanics of how you did it are slightly different.
To strip:
You hold the deck in the air with one hand. The deck will not move; it will stay there. The other hand reaches up, takes about 1/4 deck from the top, and quickly brings them to the table, Repeat three more times; the deck has been stripped.
To box:
You hold your empty hand on the table, with your thumb and forefinger outstretched and the other fingers resting on the table, as if cradling a card box. This hand will not move; it will stay there. The other hand holds the deck; you slide the whole deck most of the way into the "box," the empty hand grabs about 1/4 deck from the top, and the hand holding the deck pulls the rest of the deck back out. The "box" hand drops the 1/4 deck on the table. Repeat three more times; the deck has been boxed.
The difference:
The effect on the cards is the same, but the mechanics create subtle differences:
1. It's easier for a card mechanic to cheat while stripping the deck than while boxing. (False shuffle.)
2. It's easier to follow the cards while watching a dealer box than while watching a dealer strip.
3. It's a little faster to strip than to box, which matters if you're going to strip a lot of small packets.
In blackjack, the casinos are not worried about their dealers performing false shuffles... but they do worry about shuffle trackers trying to win money at the tables. In blackjack, the whole stack of 8 decks doesn't get many riffles, and shuffle trackers only need to know which zones are a little "rich" to take advantage. So they strip.
In poker, that doesn't matter as much - the single deck gets many riffles, and people can't really use shuffle tracking. In poker, the dealer also couldn't cheat "for the house," but they might cheat for a particular player... so using a box makes it easier for all the other players to see that the shuffle is fair. At home, boxing instead of stripping has the same effect; it lets the dealer show they're being fair.
The same goes for the single overhand cut onto a cover card; it's very hard to cheat while doing that. Cutting with two hands allows for a variety of false cuts.
I'm thinking of making a video...