I’ve never got on with automatic filtering of mail to folders on arrival. I don’t want to be hunting around to find unread messages. Only a fraction of my mail gets filed by sender, but subject and topic are only weakly correlated. I keep and file many messages, but there’s more that are only interesting the once - or never. They don’t need a place to keep them, other than the bin.
I also only read mail a couple of times a day for my work account, and a couple of times a week for the less exciting ones. So may not be typical more generally.