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Indeed, the 140 character constraint was one of the things that made Twitter novel.

No that's what makes it suck. The limitation was for SMS compatibility, but the reality is that it makes it impossible to have meaningful discourse.

So don't have meaningful discourse over SMS/twitter. Use email/phone/forums/...

Too much email. Too many people I know don't want to share their phone numbers. Forums are generally terrible.

Try using Mastodon and you'll find it's twitter with meaningful conversations. 500 characters is a game changer.