@klabb3 The underlying protocol - ActivityPub - does not have the same limits imposed by proprietary platforms (e.g. Twitter, etc.). Most constraints that exist on platforms like Mastodon, etc., are usually decisions made for a partiocular purpose (e.g. any character limit on posts in Mastodon is becausse the intended function of Mastodon is for microblogging, etc.). Different platforms in the fediverse - that leverage ActivityPub protocol - implement different constraints for similar reasons; namely, choice.
That being said, for your interest on content and less on interactions - if i accurately understood what you're asking about - may i suggest looking into the write.as platform. See https://write.as/about One can self-host this if inclined, but there's also a paid plan thrhough this company...but the gist is that its designed for much longer-form blogging (and other related functions too)...but still leveraging ActivityPub undernath which could be used for interactions if desired...but its core premise is much longer form blogs. I'm sure there may be other long-form platforms, but this is the one that comes to mind for me (at least for leveraging protocols similar to mastodon). Cheers!
That being said, for your interest on content and less on interactions - if i accurately understood what you're asking about - may i suggest looking into the write.as platform. See https://write.as/about One can self-host this if inclined, but there's also a paid plan thrhough this company...but the gist is that its designed for much longer-form blogging (and other related functions too)...but still leveraging ActivityPub undernath which could be used for interactions if desired...but its core premise is much longer form blogs. I'm sure there may be other long-form platforms, but this is the one that comes to mind for me (at least for leveraging protocols similar to mastodon). Cheers!