And then there is Templater and Obsidian API if you are handy with that sort of thing and want to do it within Obsidian, using soft coding for modified dates, etc.
It may not be very difficult but I simply tried to 1) shy away from that 2) cater to needs of the everyday Property/YAML user.
I agree that programatically speaking my solution is rudimentary.
I installed Python on all my PCs and my JB-en iPad (have Pythonista there as well) but never really touch it. A few years ago I thought Python was a possible candidate for a language to learn, now I see JavaScript more useful (but a complete novice at it), especially because of the integration of Obsidian and Templater, Quickadd and a myriad other plugins. I seem to remember you can do Python inside Obsidian as well (on PC).
NB: There is another Python method to do with YAML if you search the forums. The person has a YouTube guide as well.
- This person uses the DataView inline field method, though and most people want their Properties core functions working.