I have to be honest: what's the point? It's not as if DOS users are dying to upgrade.
But if you're already running MS-DOS, why would you switch? You're by definition a legacy user, which means you don't want to upgrade to newer software or newer hardware.Without looking at the change log, it could be to increase compatibility with MS-DOS. There's a shocking amount of old programs still running that require DOS, and whatever it is they changed in this version may make the difference between running a valuable piece of software, and having to abandon it, for ??? Some of that old stuff doesn't have a modern replacement, or the cost is excessive for the job that needs to be done.
But if you're already running MS-DOS, why would you switch? You're by definition a legacy user, which means you don't want to upgrade to newer software or newer hardware.