I think it is a heavy vinyl thing to a large extent and likely happens after the record is removed from the press, before it is sleeved. Again I’ve had a lot of quiet flat vinyl of late, but there was a period several years ago where just about every record I bought had some degree of dishing. My pet hate at the moment is really nasty tight statically-attracted paper inners that can leave scuffs from insertion/removal. It’s a one way process for me as they go straight in a Nagaoka after a wet clean, but sometimes the damage is already done and there are some hairlines or slight bruising. I was horrified to find them even in a Naim label release (the Yaz Ahmed 2xLP, which is a superb album). Unacceptable!
PS The TD-124 with its concentric ribbed platter mat does disguise dish warps to some degree as the centre label area has somewhere to go unlike say a Linn, but even so I’d notice them when doing the initial wet-clean.