I agree. I have used gnus for email in the past, but when I discovered notmuch I moved to it immediately. Gnus can work if you want to treat your email like a News Group. Not a bad approach for email lists for example, where you are mostly a reader and occasionally a contributor, and you rarely need to find an old message that you've already read. But it's not quite the right model for the way most people deal with the rest of their email which is one-to-one or small group threads.
Notmuch is like the best of the newsgroup and email models. It has a great threaded view, tagging and filtering are easy, but it still makes everything very easy to find when you need it.
Also in combination with w3m it does a really good job at rendering HTML emails in plain text. Even those with tables and other layout tend to be rendered very accurately within the constraints of a fixed font plain text view.
Notmuch is like the best of the newsgroup and email models. It has a great threaded view, tagging and filtering are easy, but it still makes everything very easy to find when you need it.
Also in combination with w3m it does a really good job at rendering HTML emails in plain text. Even those with tables and other layout tend to be rendered very accurately within the constraints of a fixed font plain text view.