If people disable JS or if it fails for whatever reason, you'll be left with an unusable site. If fonts don't load or if css doesn't load, at least you still h

If people disable JS or if it fails for whatever reason, you'll be left with an unusable site. If fonts don't load or if css doesn't load, at least you still have html and you could read what's on the screen. With JS you won't even be able to navigate to pages since it all gets handled with js. That and it often has more to load than your traditional html/css page, which means a less pleasant experience on slower connections (mobile).