I think a feature like this must exist, so any user can deside for themselves if they want to make use of it. Yes, there's a chance that an exported key gets compromised. But the upside of having a private copy is that if protonmail for whatever reason loses my key, I have the ability to have it restored by offering my copy in return.
I've read that there are plans to offer an export feature for e-mail as well. I imagine that depending on whether they are exported as plaintext or encrypted, the necessity of this feature might also be of relevance.
I think a feature like this must exist, so any user can deside for themselves if they want to make use of it. Yes, there's a chance that an exported key gets compromised. But the upside of having a private copy is that if protonmail for whatever reason loses my key, I have the ability to have it restored by offering my copy in return.
I've read that there are plans to offer an export feature for e-mail as well. I imagine that depending on whether they are exported as plaintext or encrypted, the necessity of this feature might also be of relevance.