I’m a bit concerned about the encryption situation. For now that’s a dealbreaker for me.
The LineageOS 15.1 test build can encrypt. That’s fine.
Current TWRP cannot decrypt this then. That could well be. But why?
What changed from LineageOS 14.1 (Android 7.1) to 15.1 (8.1) at this front?
What concerns me here is that the internet reports for months now that the respective TWRP on several devices can’t decrypt Android 8.1 encryption … and somehow there was no noticeable movement apart from a few fixes in non-official TWRP builds for certain devices. And now here we are on the official LineageOS/ official TWRP device Fairphone 2 with the same problem.
I somehow imagine a scenario now where the LineageOS side would think “Well, fix TWRP then!”, while the TWRP side would think “Well, fix LineageOS 15.1 then!”.
I do my system backup with TWRP. I briefly looked into other ways (dd-ing the encrypted partition block or using adb backup), and I’m not enthusiastic about moving away from the very convenient TWRP backup.
So, any definite idea who has homework to do? LineageOS 15.1 or TWRP?