Need advice about Tomboy notes and note apps in general

I'm looking for some advice on what note programs people recommend. Not a basic text editor, but something capable of doing some basic categorizing, chronological sorting, that sort of thing. I've used Evernote most recently, but I'm becoming less and less of a fan. I don't need cloud sync necessarily, although device sync could be handy. A pleasant UI (not fettered with extraneous crap) would be nice, but aesthetic appeal takes a backseat to navigation and stability. Target OS is mostly likely going to be windows 10.

What are you experiences with note apps, what are your favorites?

(A bit of context for anyone interested)
Years ago, I used tomboy notes in Ubuntu for keeping track of timesheets/daily logs. It seemed like a good program to set up for my step dad to use as well. A few years later, Tomboy notes petered out without much fanfare. I've kept his laptop running with that setup for as long as I could, but the hardware is just getting worn out (it's about 10 years old now).

So! Time to get him an upgrade. This time around, I don't think I'm gonna set up up with Linux. He isn't really up to the task of doing his own troubleshooting in linux (i.e. when an automatic update breaks something), and I haven't even been keeping up on Linux for the past few years myself. So I'm probably going to set him up on a Windows machine.

I should be able to export the tomboy notes database fairly easy, but it would be a huge load off my mind if I could settle on a decent program to migrate to first.

Thanks in advance for any input!