Earlier quoted context omitted.
Are you assuming that Chromebooks have a long term future? I sure wouldn't assume that. I also wouldn't count on Keep being around for the long term. I use it quite a bit, but only for ephemeral stuff. No matter what you use though, you should have backups of anything important.
Keep is on (all?) Android devices too. I use it on my phone to jot down things without needing to reach for something bulky like Evernote. It's pretty limited but for writing a book recommendation, shopping list, or a catchy lyric it works perfectly.
I just make spreadsheets at sheets.google.com, make it editable offline, edit on phone with Sheets app
tune in next time when I bore you with my org mode setup!