That all makes a lot of sense to me. learning Oly is where i really developed good depth, and then too much depth. A2G snatch became a way of life and I had to work to keep myself from going too deep on a regular low bar squat later.
I've never heard that before, makes me want to attempt squats in my flats now.
In powerlifting competition, you want to squat the most possible. So you want to use as many muscles as possible, and generally sitting back some to engage the hips/hams/low back more to do a bigger share of the work promotes this. You also do not want to squat excessively deep, as that wastes energy.
When the raw lifter is in wraps, you really want to load those up, descending as quickly as possible while remaining in good control, so the bar needs to stay a bit higher up so the torso can stay more upright. The quads will get used more proportionally and the wraps are used to augment that push out of the hole.
When single-ply squat suit is added, even though wraps get used, the lifter tends to get more out of the suit sitting back into it harder, so the technique shifts back towards a low bar raw squat in sleeves. The wraps are more for stability and stopping power when wearing a suit, not the primary device for carryover.
Lastly, in multiply the bar tends to move back up higher, because the absolute loads become so great that many lifters can’t handle the sheer stress on their low back to take it low bar, or keep it in place. BUT, the suit provides radical carryover, and depth requirements are typically a joke, so the lifter will still sit back into the suit.
TLDR - Raw with wraps, lifters may be the ticket. Raw with sleeves or wearing a squat suit, it becomes more hip dominant and you’re probably looking at a flat shoe again.