Well one rather disappointing difference is the posts cannot load with javascript off. While I understand why actions cannot work without javascript it still would be nice if basic functionality (seeing posts) worked.
Edit: Tested with Firefox 114.0.1 (Flatpak) with μBlock Origin 1.50.0 disabling javascript
Based on comments in other posts, this instance has not upgraded yet because captcha is not working in the most recent version.
I’m unsure if there’s a way to bypass that screen, I’m still logged in on mine but I did it before the app update.