That's a really good question that I think is also too early to see. Certainly Twitter lost a lot of developer confidence, I think people's perception of the service has changed. But does that matter? I'm not sure.
A bunch of 3rd-party devs jumped ship, and it's tempting to say "they'll remember that" if Twitter tries to lure them back,but we don't know yet if that's true or not. A bunch of advertisers jumped ship, but they could come back. The cost is that users look at these decisions and trust the platform less.
But we don't know the cost of that cost, if that makes any sense. We don't know if this ends up sparking a death spiral or if everyone complains about the decisions and then forgets about it by the end of 2023.