I’ve thinking about purchasing Proton Mail Plus only and just only to have IMAP support, but I’ve looked all the features that the Proton Unlimited Plan have, and honestly I believe it’s worth, but I hate having all the eggs in the same basket.
The features I believe worth the most are the 500GB storage, IMAP support, all the VPN servers with P2P and unlimited SimpleLogin aliases, but when I ask if it is worth the price I mean, the majority of those features I can have them having individually with others services and even at lower price.
I was using Protonmail, and their other services, and was a paying customer for over a year. But I stopped because of their poor Linux support, and not being able to receive email notifications on my de-googled phone. I made a shift to mailbox.org and am liking it. Yes, I have to manage my own PGP keys, but the experience is much better, in my opinion. Their storage even supports WebDAV. I can encrypt the whole inbox and the files stored in their drive with my own key.
But I miss their VPN service, which was good, but still, poor Linux support is what I hated the most.