I found the process of changing emails over meant I also was able to make Pass entries for them (another way I'm taking control of my data), and at the same time delete my account for websites I don't need anymore. It's been very cleansing.
Another thing I should mention is I wanted to try hey.com since it looks like they’re doing some interesting things (alerting users to tracking pixels to push back on clients like superhuman, whitelisting incoming mail, etc.) but they make it hard to get an invite so I gave up trying and paid for fastmail instead.
Also switched away from Google to Fastmail with my own domain about a year ago. Happy with the move, although Gmail still sees some activity because I never took the effort of migrating historic mails and all non-primary accounts.