The number of people I've come across who also dislike the character limit, the number of platforms that don't have it, the number of times people write long microblogging threads and the prior and continued existence of the "blogosphere" count against this defeatist pessimism IMO.

The truly dark take here, IMO, is that we shouldn't underestimate the power of a medium's configuration to shape not just the content and culture on it (that's obvious) but the way its users come to think.