And TIL that K-9 Mail is actually owned by the Mozilla Foundation.

I had to look up the history of this and found the following: "On 13 June 2022, it was announced that K-9 Mail had been taken over by MZLA Technologies Corporation, a subsidiary of the Mozilla Foundation with current maintainer Christian Ketterer joining the team, and plans for K-9 Mail to be rebranded as Thunderbird for Android following the completion of a feature roadmap" https://en.wikipedia.org/wiki/K-9_Mail

Good for them I guess? Mozilla does have deep pockets, I do hope they use it to improve K-9 Mail for everyone.