Switch protonmail.com to proton.me
For all usernames, both are blocked, as @pm.me (as reception address) is assigned to them. Some time ago, new users could only choose between @protonmail.ch and @protonmail.com - there was no @proton.me option.
Hence, it would be nice to allow older users using the @proton.me address for sending and receiving - as it already exists on the servers, anyway.

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GizmoChicken commented
Agreed! Except I'm in the reverse is situation: I inadvertently created a "proton.me" address and now wish that I had created a "protonmail.com" address. Ideally, I'd like to receive email at both addresses (and select which is my send address).
I'll add that I would be willing to pay a small, one-time fee to exchange the domain name. But, because this likely won't be my primary email address, I'm not inclined to pay a monthly subscription merely for the ability to use both domains.