I'm syncing my mail manually for 2 years now. Switched from #OfflineIMAP to #mbsync in the meantime. I'm still not sure if it's good or bad or neutral that it says:
@dpflug@ajroach42@beto As the original author of #OfflineIMAP, it's always fun to see it mentioned. I'm no longer an active developer on the project, but I still use it for all my mail.
Speaking of which, my other suggestions are #Emacs and #mu4e. #screen also; it's one of the few things that works well with the XON/XOFF that some real vt220 and such require. I do own a #Wyse WY55, #DEC vt220, vt420, and vt510 and periodically work from them. Amazing focus mode.