First of all, I love the email aliases future, because I'd rather not put my email on every single site I have to sign up for, and it's always as easy as removing the email if I don't want to receive emails from them anymore.

However, a very big issue I have all the time is certain sites that want you to enter your street address. This is especially annoying for sites you don't trust but that you have to sign up for and create an account if you want to make any digital purchase.
This idea came to my head on some online gift card website, where I needed to buy a gift card (with another gift card) since the specific one I had wasn't accepted hardly anywhere.

However, I had to create an account, and they demanded a billing address.

Usually, I find a random address on maps, but it would be super cool if Proton (whether it be built into Proton Pass or into Proton Mail, etc.) added essentially a feature to automatically add a random, real street address, in order to avoid the annoying process of looking up a random street address.