Another thing I'm waiting to see is the much more common appearance of a 'Delete my Account' button on the account details page of websites that require users to login.
It seems to me that this is needed for compliance with the GDPR Right To Be Forgotten clause, but so far I don't remember seeing it on any website I use regularly. Of course, its reasonable for a website to refuse to action this button while there are outstanding transactions or where the account balance is non-zero, but I can't think of any other reasonable exceptions to immediate deletion of the account and all personally identifiable details in it.