alt Hacker NewsI've been hit by that bug, although it only deletes mail AFAIK. There's a separate bug that completely corrupts the mail database on compaction, making Thunderbird lock up including for every future launch.
Its a beautiful open source effort but products that have bugs like that languish for 10-20 years just aren't reliable. I need my mail client to be reliable.
I've been using it to close to 20 years with multiple accounts and it was rock-solid. I wouldn't extrapolate from anecdata, in either direction.
But we should not spread FUD. If you can link to the bug I'd be interested, otherwise it doesn't add much value to claim this.