Comment by mlyle

Shoot dude, the engineering organization I mentor/teach at a high school has ~75 internal repos.

Robot source code; satellite ground station hardware; satellite ground station software; visualization; satellite hardware; satellite software; nuttx + its submodules for 2 different projects; linux kernel fork; circuitpython fork; raspberry pico tools fork; embedded programming/debugging tools; my lecture notes; my automated grading tooling; etc etc etc. That's just me + ~35 students in classes.

Pretty easy to see how when you have scale you can get to a few thousand.