For me personally, it was all about balance.

15 years ago, Gmail/Inbox was a great email client, the domain was great and popular (so no need to spell it out for people) and I would “pay” by getting ads based on my emails read by a bot.

Now Gmail is a terrible email client, the best updates are ridiculous things like moving buttons around and it takes Google years to roll out. The thing loses emails, mislabels and misclassifies stuff and the rules work for a week then blow up. On top of that, google is now basically a proctologist considering how far up my ass they want to go

The balance is broken… Google now officially sucks (IMO)

It was… I was accessing my work email which unfortunately runs on Exchange… having said that, sorry, either support whatever crap MS puts or out don’t… “losing” emails cannot be part of a ready-for-public email client

Now, from what I read at the time, it was not “Owl for exchange”'s bug, it was Thunderbird. It apparently happens with other email sources as well, however you can “repair” your mailbox to get them back when you notice