I use Thunderbird on a MacBook Air (Apple Silicon). Just be warned that it seems to use a lot of CPU resources (when seemingly not doing anything) and therefore

I use Thunderbird on a MacBook Air (Apple Silicon). Just be warned that it seems to use a lot of CPU resources (when seemingly not doing anything) and therefore uses up the battery faster than it should. It's not a deal breaker. I tend to keep it closed until I check my mail, which isn't ideal, but then again, it's not the worst productivity/stay focused habit to have. This is as of May 2023 and earlier. Hoping the update/integration with Firefox may improve this.