When I worked for a NASA contractor doing sounding rocket telemetry, the main telemetry stack programming software was a Turbo C program from 1987-1990 (TDP502.exe on the odd chance that the maybe 50 other people on the planet who have ever used it sees this). Works just fine in DOSBox, at least to create files. Still needed an actual older PC with an ISA slot to handle the hardware that TDP knew how to control. But for configuration tasks, Windows + DOSBox + a USB 3.5" floppy drive = I could do things on an actual modern system.

So yeah, you're right, emulation saves the day in many cases. And I felt like a programmer-archaeologist using DOS to launch something into space in the 2010s...