It’s the interface. Compared to Outlook, it’s dead simple. It abstracts gmail/outlook away, and doesn’t give you ALL the features of Outlook. It just gives you what you really need. And it’s not dev-specific, they’ve just somehow taught all their users to use vim-style hotkeys to process email faster. I do see a trend of the. adding non-essentials now that they’re successful, but so far the AI additions are minor and haven’t gotten in the way, for me at least.