People hate managing their email, in my experience.

What was Gmail's original value proposition? You never have to worry about deleting or filing emails anymore, because you get a ton of space and really good search.

I know a lot of people do carefully file their emails, but Gmail shipped without folders at all and they've done well with that model.

That said, their priority inbox is amazing. Automatically sorting into Primary, Social, Promotions, Updates, and Social helps me manage my day.

Automated, curated lists are great. Manual ones (e.g. folders) just add more for me to do.