Yeah, it’s fine. My use is minimal. I read email, tag some of them, and archive. Occasionally I need to search for an old email for some reason. One of the reasons I went with MM was to be able to use SpamSieve, as I have ditched Google email completely. SpamSieve also works with Apple Mail, so that’s not a valid reason for buying MM, I suppose.
Another reason was the ability to compose email with markdown. I use this mainly to paste in links, and occasionally for emphasis. Again, Mail does this too.
I will say since switching to MM, I have stopped looking for email clients, having tried Spark, Newton, Airmail, and probably others.
I use Apple Mail on my phone and ipad.
I’m a bit under the weather, so my general lack of enthusiasm probably shows in this reply.