Same, except s/notepad/vim. One big file. Easy to keep in version control (I keep it in my dot files repo), easy to search/grep, Currently has 10 years worth of stuff (well over 10,000 lines) but is still instantaneous to open and search. I've recently started trying out Logseq and there's a chance I may actually switch, but the single-text-file approach has served me very well for a long time.
I was the same, I've been on logseq for a while and I'm pretty much a convert. Syntax highlighting, embed images, todo/now/done -- all a bit more effortless.
And it all went into the same git repo as my previous vim based .plan ;)
One list which has everything. No apps, no workflow, no SaaS fees. Works better than anything else I've tried.