There's usually a balance between planning and execution. Note taking is no different.
There's no simple always solution to "plan meticulously" vs "just do it". Every choice in life is a cost-benefit analysis.
Personally, I spent a little time to setup orgmode. Works for me.
When I opened the folder the app showed me 1-2 files from years ago.
Apparently it only supports .md files.
I literally laughed out loud and deleted the app from my computer.
You've got a damn knowledge map but handling txt files is beneath you?
That app is doomed to obscurity.
Quite arrogant to assume that an app not supporting /your/ specific note-taking workflow means it's "doomed to obscurity". It's a popular app with plenty of users, a healthy plugin community, and a team of six building it. I think that pretty obviously proves you wrong.
If you were actually interested in trying it out, you could've simply run a quick find command.
find . -name "*.txt" -exec rename -v 's/\.txt$/\.md/i' {} \;
The only annoying thing was that in my text files I often used indentation to group stuff and in markdown indented text is treated as code block.
Who would agree with using a note-taking approach that does NOT work for you?
One of the ways to figure out which note-taking approach works is to try the note-taking approaches from other people... It could be 18 multi-step note taking approach or it could be dead-simple. Unless you try, you won't know which one works for you.