I use Evernote Premium on my:
Windows 10 PC, which has 6gb of Ram and a 2.2ghz i5 processor
iPad Air 2
It's becoming next to unusable. The PC is just about still ok, though there is frequently a delay when typing, especially when creating a new note.
The iPad is a pain, it lags and is unresponsive for several seconds at a time when trying to shuffle through notes, with keyboard lag as well.
The Moto G4, which is where I need to use Evernote most, is now barely usable. I just counted 54 seconds to open Evernote with two "Evernote is not responding" messages. It then took a further 45 seconds to open one of the notes.
I have gone from using it for everything to not even wanting to open the app anymore. I have uninstalled and reinstalled it twice.