As a textile geek I’ve been watching this happen for years. I bought some underpants and liked them so bought another package. The bag had a different design but I thought nothing of it. When I opened the new bag the cloth felt rougher and way flimsier. I actually weighed them and the new ones were 1 gram less than the ones I liked. Immediately noticeable.
Enshittification of the clothes on your back has been in full swing for a while.