EDIT: I moved this offtopic keyring topic to its own thread. I should never have posted it here!
offtopic
I’m on mobile Linux, so I have a keyring already populated with keys. I also have all the standards-based tools for key import and export to and from the keyring. All my other mail clients talk to my keyring; having Deltachat also talk to my keyring would actually be really convenient. It would also make key tools more reusable.