The limits are definitely shorter now. I also checked when I created URL Pages [0], which hosts entire web pages in the URL.

However there is a link shortener that is quietly hosted by GitHub called https://git.io that doesn't seem to have a length limit as far as I've discovered. [1]

0: https://github.com/jstrieb/urlpages

1: https://jstrieb.github.io/posts/git-io