I completely understand that SMS compatibility is a big reason for keeping the limit. I just don't think it's a good enough reason now that most users aren't us

I completely understand that SMS compatibility is a big reason for keeping the limit. I just don't think it's a good enough reason now that most users aren't using SMS or are on MMS where they have more than 160 total characters to play with. They could provide an option to SMS users to see a truncated tweet or a URL with the complete tweet, deprecate SMS but keep it around, and not let themselves be constrained by it.