Unfortunately the hard product work of simplifying the feature set and prioritizing server-side tech debt was overlooked. Therefore the new app was weighed down from the beginning because it had to support all these legacy systems.
IMO the best move for Evernote is to rethink the UX and tech architecture from first principals and have existing users opt-in to migrate their data over. It's a tough decision to make but I don't see any meaningful progress being made otherwise.
https://support.spotify.com/us/article/ongoing-issues/