[shaftway]

Full disclosure, I'm a Googler, but these are my own opinions.

I use G Suite (or G Workspace) for my vanity email address, but I use gmail for pretty much everything that matters.

My email is set to auto-forward to my gmail address and my gmail address can send email as my vanity address, so I pretty much just use that for everything. When signing up to third party sites I use my vanity email and the forwarding makes everything just work. But when I use Google services I use the gmail address.

Part of this is for historic reasons (I had the gmail address first), but there are some Google services that don't work quite as well for G Suite domains. Services tend to launch for gmail users first, and then, maybe, for G Suite. This is most obvious in recent acquisitions. Nest doesn't allow me to use my G Suite email when setting up an account. I assume once the Fitbit integration starts happening I won't really be able to use it there either.