That’s correct. If you use a custom domain for your aliases, you can take them with you when you leave.
I still use their domains though, for the last reason you mentioned. I’d be interested in knowing of there are any truly anonymous domains you can get (preferably without crypto nonsense).
My main blocker for using simplelogin features was that it would make me dependant on proton. But I see this in the new features :
Does this mean that theoricaly if I move away from Proton I will be able to easily migrate all these adresses?
Although this feature looses a big part of its relevance if you are using you own domain as it is a big identifier alone.
That’s correct. If you use a custom domain for your aliases, you can take them with you when you leave.
I still use their domains though, for the last reason you mentioned. I’d be interested in knowing of there are any truly anonymous domains you can get (preferably without crypto nonsense).