Mastodon [0] has a default character limit of 500, which individual instances can turn up or down as they see fit (Mastodon is a federated network). Hundreds of thousands of people use it and the social dynamics work just fine, or even better, with the additional breathing room for expression. To me Twitter's attachment to such a low cap feels like an anachronism. [0] https://joinmastodon.org
Very cool but too nerdy. Visiting that site requires clicking "Get Started" which then directs you to a list of instances, from which you choose a server and sign up (not sure because in the age of 140 chars don't have the attention span to follow through). Without doing that there's no content short of a bunch of reasons why Mastodon is open and free, but the average user doesn't care about that. It's kind of preach…
There's an instance chooser wizard at https://instances.social/, but I can see someone looking at that and calling it too complicated as well.