Earlier quoted context omitted.
There are plenty email providers out there. Free and paid. It should not be a problem for anyone to switch. Moving off of Gmail doesn't mean to self host. It is a bit of work to tell anyone about your new address, but that's it.
Changing upwards of 200 logins to use a new email address may be troublesome. Do you keep a list?
Edit: Looks like LastPass does it with a screen scraper https://support.logmeininc.com/lastpass/help/how-do-i-update...