Like @alexcccp said in the previous message, Thunderbird really need to support OMEMO for XMPP, if it really want to be an all-in-one solution. I would even add, that it need to have OMEMO support added yesterday.And @unbroken is right, if there was ...
A mobile version of Thunderbird supporting calendars? I dream of it at night!Support of adresses-books/contacts on top of it would make it perfect, in my eyes.