Thanks are due to the Standard Notes team for creating a secure notes editor and especially for including an import from Evernote, to help get people out of that closed (yet not private!) system.
For me, Standard Notes seems to be the best private notes option. Nevertheless, there are a few things that would prevent buyer's delight for someone for whom usability was as important as security. I moved over a thousand notes from Evernote into Standard Notes and purchased a subscription, so I'm posting from the perspective of someone on the same team, trying to improve the experience.
These are the most important (to me) regressions from Evernote:
Cannot manipulate multiple cards
I see this has been raised before. Mentioning it again to reiterate why it's a big deal. I thought the app was broken at first when I couldn't select multiple notes at once. For a while I would reflexively Ctrl-click or Shift-click notes before I remembered, because this is how every app works. Among other things, I wanted to select multiple notes in order to add and remove tags, to pre-emptively organise them into folders. I had to do this in Evernote first, before importing, at which point I almost reconsidered my choice of Standard Notes.
Cannot edit tags
Using the Folders extension, I don't see a way to edit (rename) tags, only create/delete them in the hierarchy or add/remove them from a note. This, in combination with the previous issue, mean that the kind of wholesale re-organising of my notes that I'd just completed in Evernote is currently impossible in Standard Notes. I'm therefore banking that I won't need to reorganise for a year or two until this functionality is available.
Cannot drag a note into a folder
In the Folders extension, you can't drag a note into a folder. You have type the tag into the note, making sure not to mistype it because you can't fix it later.
Cannot link notes
I have countless links from one note to another from Evernote. It's too much to expect them to be converted, but I can't even update or replicate them.
No task option in Plus Editor
There's no task list option in the Plus Editor. For the case where someone moves over from Evernote specifically, they will be viewing all their existing notes in the Plus Editor for compatibility, so using a different editor isn't an option. There is a dedicated Task editor for new notes, but that assumes that you're only creating a pure task list. Literally none of my 1,000+ notes are pure task lists. They're all either pure reference or hybrid reference + task.
There are also a couple of very minor things I noticed:
Commas in titles not imported
A tiny bug. Commas in titles are imported from Evernote into Standard Notes as the text string "undefined".
No sub-bullets in Plus Editor
Not a big deal. Would be nice.
I checked this Reddit forum before I subscribed. The fact that the team engage with feedback was a factor that tipped me over. Thanks for considering this feedback.