Which is very sad, if you think about it. None of that benefits me as a user, it's for their benefit.
1. Use of JS to reimplement standard HTML widgets. This has broken my screenreader more times than I care to remember. 2. All of this user-irrelevant garbage, like the dialogs, the social media buttons, and so forth.
I remember a few years back trying to pay my electric bill. Yes, I was using a JS-capable browser. I couldn't actually pay my bill, but there were plenty of "follow us on Facebook" and similar. Like seriously, folks, I just wanna send you money. Really, this should even be something I could do without JS.
Another example: we do online shopping at https://www.fredmeyer.com. Their website is absolutely terrible, with all of the busyness, some of it user hostile. Seriously folks, I just want to give you money for product, not follow you on facebook.
Some sites get it really, really right. I play chess on lichess.org. That site requires JavaScript. And I don't see any way that it could possibly be avoided. But it works beautifully with my screenreader. It's snappy too, even under Firefox on a Raspberry Pi. I used to be a hard core "screw JS" guy. I've softened my stance, because I know it can be used correctly and to great effect.