My experience with Instagram Reels and Youtube Shorts and Facebook stories (and all the other things that compete with TikTok) is that it can still get its hooks in, but you have to invite it in. That is, if it doesn't immediately grab you, its not enough to open TikTok and idly doom scroll for 2 minutes. You have to consciously watch for 15 minutes before it starts to alter your brain chemistry.

I did that (scrolled for 15+ minutes) around a dozen times. I kept waiting for the algorithm to serve me that really great addictive content, but I only found a couple actually good creators.

Most of the best videos I saw were Vine compilations