@gazumped, @DTLow and @bradh thank you for your responses.
That is sad to hear, I am literally heart broken.
I am giving DEVONthink a shot, although I admit it will be not trivial for me to switch from Evernote to anything else, and I will try not to go on that route if possible but being able to write equations in notes for me is crucial. Anyway, thank you guys again for your comments.