No, there were two devs working on the 68k Mac compiler, with ~10 devs on the x86 side (though both targets shared a lot of code and differed mainly in the late codegen and peephole optimization phases). I never worked on the 16-bit code; the 32-bit and later 64-bit x86 backend was a different codebase from the 16-bit stuff.
If I remember from poking around at the 16 bit version in that timeframe (1.52?) there was still an option to generate P-code and (this is now nearly thirty years ago) that was used by Excel to minimize code size for the segmented 16 bit systems.
Any idea how many devs are working at Microsoft on the C and C++ compilers these days? I've heard rumours that there's more on the Rust team and that C++ is taking a back seat.
No clue. I left as a full-time employee in 2007, did a few contractor gigs with various old teams of mine to help out, but that was done by 2013. I lost touch with how things were going internally after that.
