A couple of questions -- what didn't you like about Obsidian? Have you considered Emacs and Org-mode?
YAML is more for configuration and meta-data, so my original question didn't make a lot of sense.
You've helped clear my confusions so for that, thanks so much!
As for Obsidian, I just wasn't super keen having a whole extra app just for my note-taking. I like simple Notepad++ (or Geany, now that I'm moved to nix), as it can work on any files, not just text/MD/note docs.
This is when I realised it was getting serious. But he’s a Norwegian born in the 40s, so talking about his mental health and opening up to him is near impossible.
I did call him out on these massive lapses in memory, but jokingly though.
However, without formally addressing anything, he started out of no where and never, ever before doing it my entire life: sudoku.
1-2 hours a day, then more, all the time.
He’s now in his mid 80s and as sharp as ever.
I know he went and saw a GP, and they prescribed sodoku.
But the effectiveness of it, taken seriously, is absolutely incredible.