I have been using windows exclusively for 20 years now but just made the switch to Linux (EndeavourOS - an arch distro) 1 week ago and I couldn’t be happier!
99% of all applications that I use work just as well (including games) and for the very very few that won’t work (like Valorant) I am using a dual boot setup. The reason that I made the switch was that I got anxious with W10 EOL approaching since I would rather stop using windows altogether than using W11.
I would also love to know the app! I actually did the exact same thing except I used my To-Do list app where Reddit is Fun used to be and it has honestly helped already.
In my mind at least this would be solved by the “vault” needing to be decrypted with a password every time notes are accessed/saved with the password acting as the key? I’m not terribly well educated on encryption though.