That's so sad to hear. I've been a paying customer for over 10 years and enjoy being able to have embedded videos and the audio playback is also great.
However, stacks are a complete waste of time as I need another few layers to organise the various areas of my life. My sidebar is becoming too cluttered as a result.
I'm having a serious think about this. Evernote is becoming costly and cloud storage is so cheap nowadays. Joplin is free, has nested folders, it's open source and has great, free sync with Dropbox.
I'm really struggling to hold on to my Evernote subscription... and I want to!