If you're not using more common organization tools like modules, naming tends to be where organization is implemented: common prefixes, etc. Even if they're carefully done, you still end up with a long list of names, with a lot of implicit rules to keep in mind to decode the name (this is why Hungarian notation seemed like such a good idea in the beginning, and a bad idea once it was actually extensively used). Names shouldn't need decoding.

I haven't looked deeply at HTMX, so I won't claim they're falling prey to this exact problem. But it's definitely a code smell that's concerning.