[jacooper]

Proton's feature is its privacy adovacay and now its ecosystem.

Its a compelete ecosystem designed with privacy in mind, and encrypting emails is not the only benefit, another ProtonMail benefit is that no one can read the stored emails, only you can do that.

[selykg]

Maybe so, but if the recipient of the email, or sender of the email is not using an email service that provides the same then those emails should not be considered private. They might not be accessible on my email service, but they are on someone else's.