Ideally, but I'm willing to trade... temporarily, only because it's not my primary, or even my personal inbox.
Why waste 100 hours of my own time, minimum, going through my hundreds of thousands of emails adhoc to find examples like receipts from 10 years ago from an obscure ecommerce site?
Yeah, I definitely see the appeal on that. I'd pay for this as an offline app that doesn't hand over all my emails to a random third party though. Pity it's only Goog/MS/Yahoo so far too. Really, it should be any IMAP server and offline only. Someday maybe?