I've had the built in version control do unexpected things, so I play it safe and create named backup files. I usually end up using that one file, but I've been saved on occasion
If you think this process involves enough mindpower to check the time, let alone figure out where the dashes are in whatever language keyboard setup I'm using at the time, you are wildly overestimating how much care goes into doing this.
Well, if you can't be bothered to ensure file names mean something, then you get to enjoy the results.
In the Real World®, sometimes files get shared and traded around, and conversations happen about them, and you need to be able to quickly verify you're looking at the same doc.
We can't all be connected to the same version control system.
I generally do this on my NAS, combined with nightly and bi-weekly backups, plus a 6-mo safety backup, to a backup drive. Also, basic off-site nightly backups for important stuff. If I worked on really important stuff that required lots of versioning, though, I'd probably go with a versioning system instead of inserting the date.