Thunderbird stopped being amazing about 10 years ago. No signs of recovery in sight. I don't know much anymore, but I used to follow the development, and sadly

Thunderbird stopped being amazing about 10 years ago. No signs of recovery in sight. I don't know much anymore, but I used to follow the development, and sadly started noticing decisions and mistakes that brought us to this today. Can there be an amazing product behind a non-profit group? Firefox, at least, seems quite better than Thunderbird.