Tech Instagram is worse they just like looking at flashing colors on screen with no meaning. I once saw like this dude flexing about how complex his code is by showing like this obsidian ass diagram like dude what am I supposed to appreciate here? how coupled your code is?
You can absolutely find non-performative posts on Instagram. There is value in a sincere post - ex. sharing pictures of your cat to your friends.
Whereas in LinkedIn no such value exists in my experience - I can't imagine myself posting there for any other reason than to be performative.
So in terms of % of posts being performative I don't think anything tops LinkedIn.
Interestingly, unlike instagram the LinkedIn business model has nothing to do with it. It’s built around b2b sales and professional recruitment.