There is a separate thunderbird app from k-9 now, so apparently not just an update. Obnoxious though that the new app lists a bunch of collected data types while k-9 doesn’t list any. Maybe just a legacy thing since K-9 has been around forever and they didn’t list them originally, but still upsetting for the privacy minded.
TB:
K-9:
Well these guys from Super Mario Galaxy would probably look pretty round from the side I guess.