Pretty much the entire web works just fine without JavaScript. Indeed, most of it works better without it - everything loads faster and there’s fewer annoyances like interstitial ads, auto playing audio, etc. Unless you’re serving an actual app, like webmail or online office, a webpage that doesn’t even render without js is an immediate bounce. I can get your content elsewhere.

I mean, almost the entire public web consists of blogs, forums, and news articles/essays. Almost all of these, with some modern exceptions, work perfectly fine. Of course, you may need JS to take full advantage of e.g., forum software features, but I can browse just fine. Sure, if you have a legitimate SPA like a mapping application or a game JS is a very reasonable expectation. But it’s hard for me to see what users gain otherwise. Actually, I don’t even see what developers gain, other than an improved resume.