A few years ago, I helped repair a broken USB port, on a USB-floppy emulator...

...which was so the operators could sneakernet their NC tape files into an IBM PC 5150 that thought it was talking to a floppy drive, of course...

...which hosted an ISA card that emulated the punch-tape reader that the NC lathe had originally been designed with.

The NC lathe hadn't missed a beat in 50+ years, why mess with what works?