I was at a talk at FOSDEM this year and they were talking about how most emails now (over 90%) are transactional in nature and not personal. Things like password resets, offers, 2fa, shipping confirmations.
This was a lightbulb moment for me - for years I'd been trying to fight email by using sieve to filter away the most annoying senders and subjects but they're right - almost all email doesn't deserve your immediate attention.
I switched my method to whitelist. I created a folder called Transactional and everything goes in there. Then I started whitelisting certain email addresses to let them get to my inbox. I have around 20, and for the first time in years I'm at a point where I could have notifications for my inbox. I still don't, but they'd be useful now