Seriously, there's really no competing products beyond OneNote.
I was an Evernote subscriber up until recently; I simply found that the functionality was too easily duplicated in OneNote; Evernote literally provided me zero advantages.
Now, my history is I have always been an open-source fan, run Linux since the early pre-1.0 kernel days, and ran Apple Macs for years before finally migrating back to Windows about 2 years ago. Mostly I did that because of work, but I had gotten a Surface Pro about 4 years ago or thereabouts that I absolutely fell in love with for a portable, simple computer with which I could also do some awesome note-taking with the stylus. This includes drawings on the screen when I need to (which in my job these days is often).
When my Surface Pro got long in the tooth I moved to a Dell Venue 11 Pro, which is what I'm typing this response on. As well as being a really good tablet, it also has an extremely good keyboard if you get the accessory keyboard with the integrated battery. It also has the advantage of giving me runtimes on battery that are just insane and I have never come close to killing both batteries (though I have drained the battery once or twice in tablet-only mode). At this point I have dozens of OneNote notebooks, many of which are archive/reference... but the new active ones are synced to all my devices at once. That means that when I get home to my nice big desktop machine, I can bring up those notes without even thinking about it; no saving to a Dropbox-alike solution, the notes are just there. And I can slide them off to a second screen I'm using for reference material while I work on the action items from those notes on my nice comfortable desktop. Meanwhile my Venue sits quietly on its charger waiting to be taken out again.
Now, there definitely are times OneNote is not ideal. I don't use it for very personal notes... the stuff I don't want synced to a Microsoft-owned cloud (or anyone's cloud come to think of it). For that I have my OwnCloud server with OwnNote. While it doesn't do the hand-written notes, I do have an OwnNote client on my phone so I can tap in quick notes or reference notes I have stored there. I can also hit it up easily at my private URL to quickly get some notes entered... but even I admit it's not as slick as OneNote. Now, having said that since I also have the OwnCloud client on my laptop, I can create text notes in the "Notes" folder in my OwnCloud on my local machine and they also become notes... so there are multiple ways to skin that cat.
So one-size-fits-all? No... but OneNote is good enough for almost everything, and for those few corner cases I find OneNote doesn't work, OwnNote works perfectly. These two tools have become the things I use every day and mean I'm not constantly losing paper notes (my old method).
Having said all that, I DO carry an old paper notebook around as well just in case I'm ever in a place I have no power or access to a computer/phone (VERY rarely, but it happens). If that happens, I whip out the paper notebook and write a quick note... and if I want to digitize it I can either transcribe it later, usually into OneNote so I can translate over diagrams as well.