Oh, I thought the 500 char limit in #Mastodon was configurable. Now I wonder what software are running on the instances of people who post long toots. For the moment, I found this sight fork:
https://github.com/hometown-fork/hometown/wiki
https://github.com/hometown-fork/hometown/wiki
caos •
With the forks of Mastodon it is easier to increase the character limit, but there is also a workaround for the normal Mastodon (for admins, text in german).