Switch has the benefits of all the portability the platform offers with a tad bit of lag between PC and Switch patches. PC has minimal portability (you can use Steam Link over your phone line, I suppose) but tends to get patches a little sooner and has access to some basic official and player-made mods.
On the rare chance that something totally butchers your save file or you run into a similarly damaging bug, you can access the backup save files on PC (the game keeps a rolling backup in the form of your current save and your previous two saves at all times). I'm not sure whether or not you can use the backups on the Switch version.
As a final note, if you ever think you might want to save edit for any reason, you can do so on PC. I'm not sure if you can do this on a hacked Switch (you probably can), but I'm certain you can't do it on a normally functioning Switch. Save editing the game requires some basic knowledge in XML or other markup languages, though, so don't let this factor influence which platform you choose unless you have that.