I consult with large companies, and right-to-be-forgotten generally just isn't a priority for them. It keeps getting moved down the backlog. Furthermore, accounts get deleted accidentally all the time, so managers are reluctant to hard-delete.

Then there are the peripherals - global db backups with x expiration date, random documents on various cloud providers, etc.

In short, I 100% agree that you should keep your main email (at the very least) off of anything possible.