[smhenderson]

All of which were heavy enough at the time to slow programs down enough that people chose to not use them in favor of faster, more portable C.

[pjmlp]

That is why Turbo Vision was written in C++ for MS-DOS, Mac OS transitioned from Object Pascal into C++ and Quake made use of Watcom C++.

[morelisp]

id's engine was famously C, not C++, all the way through Quake 3.