I have ignored twtxt in the past, but now I'm hooked.

As for twtxt.net, I think it's a great initiative. I won't use it myself because I always prefer self-hosting, but lowering the bar for non-tech people is a good thing in my book.

(Just make sure to retain full compatibility with self-hosted twtxt files, now and in the future. At the moment, this works fine. If, at some point, it became kind of mandatory to use twtxt.net, because important features $a, $b, and $c don't really work with self-hosting, then you'll probably be facing the wrath of some angry nerds. :-))