Without the syncing, there would be absolutely no reason for anyone to buy that instead of just going with for example Joplin or Obsidian though, since the biggest disadvantage of those when compared to Evernote is the lack of (zero-effort and convenient) sync across multiple devices and lack of web client. And if there's no sync, then the web client thing doesn't matter anyway, and at that point the free alternatives offer more than this basic plan idea since they have no limits on notes or folders.
That said, a one-time purchase with sync and a 5k note limit (though, honestly, any limit should be on total file size used, not total number of notes, and there's absolutely zero reason to limit number of folders other than to be mean) is something I could have gone for if it was reasonably priced, though.