For email I disagree. notmuch and mu4e are very good and being able to apply your normal text editing tools in a text oriented context like email is very useful. If there are better tools out there I haven't found them yet.

I like having my email in Emacs, so i can reference it from org. I also like to write mails in Emacs. Triaging mails in notmuch-emacs is also quick and painless. Reading HTML mails, though — not so much.

I avoided email in emacs for a decade, using exactly this reasoning.

A few years ago I got fed up with not being able to configure Mail.app to notify me of responses to "watched" threads but nothing else and thought "...I bet the CLI tools would make this achievable."

So, I moved to mbsync for fetching email, not much for indexing the local email directory, and notmuch-mode / Emacs for reading and writing email.

It's head and shoulders above any other email setup I've ever used.

I wish I'd done it years ago.