I was surprised they were actually affecting people since it really didn't make sense to run Windows on DR-DOS anyway. You'd run MS-DOS and MS Windows, or you'd run DR-DOS without any GUI (they provided a DOS task switcher with multitasking which was actually fairly decent) or you'd run Desqview. But apparently many people were quite incensed that Windows wouldn't run properly atop DR-DOS.
For me, it was a matter of wanting to run DRDOS for its benefits and the occasional Windows program on top. See, the problem was that MSDOS was shit. DRDOS had a lot of polish to it, including a few things like the ability to undelete files (including the first letter) which Windows and even Linux cannot do to this day.
It gave you more memory, and for a command-line OS it was a heck of a lot friendlier than MSDOS, and a real boon for developers and gamers. Mostly it was a lot of little things, like the in-kernel command history. You didn't need DOSKEY or whatever, it did that automatically and unlike MSDOS, it would work inside applications. In DEU, for example, it would remember the command history on the DEU command-line as well as command.com. The CLI editor allowed you to delete words with CTRL-T which Windows 7 can't do. TYPE and virtually every other command could use
At the time, if you were doing DOS application development, it really had a lot going for it.