For me, Gmail is just fine. :)
Agree 100% !
Switching away from Gmail would arguable cost me a non-trivial amount of time and effort - just think about the various accounts where I've entered my email, I'd have to update it in all those places. That's a big waste of time and effort, to achieve which benefits exactly?
Besides, Gmail (being free, rather than $99 per year) has a number of great features, e.g. powerful search (I also like the system with the labels), integration with Google Drive, etc. Plus it's super reliable, has a straightforward UI, and spam/junk email is virtually non-existent.
So yes, interesting idea, but for me it would be merely a distraction with no tangible benefits, Gmail is already perfect for me.
Maybe it's only worth it if you're on a total privacy crusade, so then you also need to stop using Google for search, start browsing in private/anon mode, stop using Facebook, etc.
We're a place where coders share, stay up-to-date and grow their careers.
We strive for transparency and don't collect excess data.