I wouldn’t call Thunderbird “decent”, I’d call it nominally functional.
Performance is terrible, lots of lags, etc. And this on a fairly new, recently rebuilt, 16gb Windows LTSC laptop (so no bloat).
And then there’s the UI stuff - monochromatic so hard to tell where one window/tab starts/ends, etc.
Doesn’t look like it works with other calendar systems yet?
Also it only works with a Notion account? It gives me no other options - just “Login to your Notion account”.