36 year old me is very glad to have learned VGA graphics programming with Turbo Pascal and Turbo C++ during high school. I've met kids these days coming out of university CS degrees in the U.S.A. that still don't have a solid grasp on how pointers work.

I believe it is in every programmer's interest to have a deep understanding of the system for which they are working on, even if they don't need to use the low level tools from day to day. Teaching C++ in DOS can still provide an excellent CS foundation IMO.