I don't understand why evernote do not support entire note encryption (with attachments) and/or notebook encryption. Titles and tags can be sufficient for searching, and as others have said, if we lose our encryption keys, more fool us ... but with the likes of lastpass etc, we ought not to lose them ...
So I can only think of two reasons why they haven't done it: either they are monetising our data in some way, or they are simply lazy rent seekers - there are plenty of existence proofs that the encryption task would not be hard to implement in such a way that the only thing that leaves a device would be encrypted, but we could decrypt locally (e.g. saferoom).
So which is it? Evernote has an ulterior motive, or they are lazy and haven't really understood the importance of security to those of us who hold sensitive data? I use Evernote professionally, but come May and GPDR, like everyone else in Europe, I wont be able to risk the leakage of personal information into Evernote. So, Evernote, you have four months to fix this, otherwise I'm gone!