[zAy0LfpBZLC8mAC]

Because it gets abused by so many. It's used to track, to annoy (popups, autoplay and all that crap), it often breaks hyperlinks (you can't link to content that is loaded by JS code instead of by clicking a link), it blows my data cap on mobile, it heats my CPU, and it drains my battery.

If I start my browser with JS enabled, it takes a few days and Firefox is at 100% CPU continuously, making my laptop battery last 2 instead of 5 hours, and if you start a packet sniffer, you see how all kinds of tabs are constantly reporting back to their mothership what I am doing.

That is why I keep JS disabled.

Also, most things that can be improved in websites (not to be confused with web apps) with JS would be better implemented as browser functionality.