Thats what happens when you used a language which has an ISO or similar standard.

Sure, but you also have to stick to the older standards. This wouldn't work if Lua were using any of the new features of C99.

Turbo C 1.0 was actually pre-ANSI C. Turbo C 2.0 was compatible with a draft of the ANSI C standard, and I recall having some trouble getting Lua 5.0 to compile with it due to locale stuff.

The video actually features Turbo C++ 1.0, though, which was a different product, so the title is misleading.

Regardless, I agree that standards are very nice to have.