I keep it simple: A bunch of semi-organized markdown files + resilio sync (+ an old always-on android phone for a resilio 'server'). I can continue living in Emacs (and a markdown-friendly android app).

I tried to bespoke notetaking things (evernote, google keep, trello, orgmode, et al) before I figured out I was just dumping bits of text and never actually used the organizational/tagging/convenient features.

I guess it would be nice to have quick and easy ways to search and archive notes on my phone but I can live without it.