When comparing MS-DOS vs TempleOS, the Slant community recommends TempleOS for most people. In the question“What is the best operating system for a developer?” TempleOS is ranked 14th while MS-DOS is ranked 16th.
Ranked in these QuestionsQuestion Ranking
Pros
Pro Use old editor Edit
The grandfather of Notepad, very easy to use, hassle-free text editor.
Pro Brings back memories to older developers
Pro Best OS to run QBASIC on
While QBASIC works on newer operating systems, such as Windows 95 and Windows 98, it was designed for and runs best on MS-DOS.
Pro It's templeOS
Pro Allows you to talk to God
TempleOS comes with an oracle that lets you communicate directly with the Lord.
Pro Created by the smartest programmer that's ever lived
Terry Davis wrote the entire operating system, and the compiler for the language that the OS is written in, by himself.
Cons
Con Not a modern OS
If you need to know how to run legacy software that will run on DOS (crazier things have happened, there's probably still some ancient, leviathan, software out there that requires it), go for it. Otherwise you're practicing skills that are out of date and are using an operating system that is woefully insecure.
Con Literally horrible
MS-DOS is terrible -- just read about real mode. It was an almost decent solution for its time, but not anymore.
Con Way too simple
A stripped down version of Unix, some commands just got renamed and advanced options removed.
Con Dead
Ended in the 21st century.
Con No internet support
Using Internet with MS-DOS is not trivial.
Con Lead maintainer is dead
Terry Davis was hit by a train and it's unclear who will be taking over the project in his absence.