Data storage reliability could be dramatically improved by dropping mbox for maildir at last
(it would make imap support more natural too BTW)
maildir support has been requested since 2000 but unfortunately it seems not to be on
thunderbird authors radar, even after all the mbox robustness problems people predicted then
materialised
https://bugzilla.mozilla.org/show_bug.cgi?id=58308
Every thunderbird user with data storage problems should vote on this bug.