This has mostly been my experience as well. I moved my email and calendaring to Fastmail, keeping my vestigal gmail address. I use this google account for Docs

This has mostly been my experience as well. I moved my email and calendaring to Fastmail, keeping my vestigal gmail address. I use this google account for Docs and nothing else. (For academics, do not keep your writing/cv/syllabi/etc in a Google account tied to your university email address!) I still get a personal email addressed to gmail every couple of months despite a years-long process of autoreplies asking family and friends to move to my new email address. It takes a long time but it's worth it. As I've started hosting more websites (mostly academic projects like unfold.studio or learning-machines.net), I have come to appreciate more and more the ability to point multiple domains' MX records to my single fastmail account. A nice additional benefit is the ability to handle wildcard email addresses. When I log in to ebay, it's with ebay.com@<subdomain>. When I log in to the IRS, it's with irs.gov@<subdomain>. When someone sells an email address or starts spamming it, I can cut it off. And I can hope that maybe a few less rows are getting joined in the big database in the sky.