They really haven't improved Mail in a long time now. Still can't use your own keys, still can't have a clean unmangled export, still can't send using your own

They really haven't improved Mail in a long time now. Still can't use your own keys, still can't have a clean unmangled export, still can't send using your own keys. It's almost like Protonmail is intentionally hostile to key management outside of their control.