You're not wrong, but I believe that's a limited perspective. Tell me a large software development company that hasn't dropped projects? We'd be here all day counting the things MS, Apple, Adobe, Google, etc. have dropped.
Google is going all in on Flutter. They're using it in house for their own apps more and more. And Flutter is the native app development experience for Fuscia.
Suppose Google did move on from Flutter. It's open source and has great support from the community. Support from ByteDance alone would be enough to keep it thriving.
Of course, there's nothing wrong with waiting for a framework/languge to become an industry standard before joining the community either. There's a huge number of options out there. No one can learn and develop on everything. I'm just saying that using the criteria of not trusting a company that has abandoned previous coding projects would leave you with few, or zero, options.