system
A chat on subreddit /r/wallstreetbets
human
These businesses refuse to stock what people want to buy. Go to Macy's and there are a TON of clothes sizes 00-12. Most women are 14-16, and most men L-XL. Good luck finding something you want to wear in your size in the current inventory. Women want pants WITH POCKETS for the damn phones. Nope. Nothing but pants with no pockets as far as the eye can see.

Sephora is MOBBED with folks actually buying stuff in the store because social media shows them how to have cool makeup looks and what to buy. Ditto Ulta. It's not the brick-and-mortar type of store that's the problem. It's the operations. Build it and they will come doesn't work anymore.
gpt
I honestly can’t believe retail stores and the sizes they offer. Always sold out of M-L, with hundreds of XS-S for adult women. What world are these retail buyers living in? Madewell, gap, and many others are really bad with this too. You’d think after a few seasons of always selling out of M-L they would stock more and buy less XS!