Alas, twitter is has never been like "every single company", and I presume it would have languished in it's pre-musk state for many more years before it got cancelled.
I don't see any reason to think so. As an early Birdwatch/CN contributor and also a long-time user of the API, I've always thought their back end stuff was pretty great. API v2 also rolled out pre-Musk and was actually great until he crippled it with absurd limits. I'm not going to pay thousand$ for the privilege of churning out free network analysis; last time I checked you could only collect 1500 tweets/month before a very expensive meter started running on your API calls.