@holly@mstdn.io the admin basically just let you Toot the length of the database field, so 65535 technically :) Also stuff like Markdown, Latex typesetting and things, bascially each admin can make their own decisions, which adds to the variety :)
You can also do stuff like, change your theme, and stuff in preferences, you'll find it pretty flexible, I believe.
Also with the mobile apps, shop around Android has Tusky which seems to be the best, iOS have a few different versions as well.