[axod]

It won't really matter though.

The 3rd party clients can all just get together and setup their own backend. Most people are using 3rd party clients anyway.

If a few influential people with tons of followers were using twitter client X, and that client decided to stop using the twitter backend, and instead use something else, you'd likely see a mass exodus (As long as the client was good enough and available on multiple platforms etc).

I guess my point is that the valuable bit, the bit people care about, is the client, and who they can access from it. The network, protocol, backend etc, meh.