I really like Mimestream, which is a native client for Gmail.

Very fast and supports all the usual native macOS keyboard navigation, e.g. shift or command to amend selection in a list.

I've heard good things about it, for sure, but I'd argue that it isn't really an Email client. It is a Gmail client as it doesn't work with anything else. Fastmail is in the same bucket, but it is part of my contention about there not being good Email apps generally.

It’s really tempting - uses their API for that speed.

I’m worried Google won’t like it someday. It’s such a hassle if they shut you off that I want to seem like the most normal user to them. Pay Mimestream, skip ads, avoid Gmail app telemetry… any incentive for Google to permit it longterm? (Like maybe you’d switch to Fastmail if they killed Mimestream… or maybe not!)