This is a sad outcome, but once upon a time Twitter had a choice: be the defacto messaging backbone for the Internet or compete with Facebook and be a destination website/app. They chose the latter and rewrote their TOS to effectively eliminate 3rd party development on their platform. An entire ecosystem of companies, products and tools was destroyed because Twitter couldn't imagine or articulate the value of powerin…
Who is going to step up? What kind of institution could deliver something like that, while remaining open and accountable? A Wikipedia style foundation?
My guess is that it needn't be (too) expensive to run, especially if you hand over responsibility for long term storage of the messages to third parties.
My PhD (in progress) is based on the public utility of Twitter data. I'm deeply sad about this.