[solardev]

It's also huge in web dev, graphics, marketing, etc. Every single web dev I know uses a Mac. The hardware guys prefer some Linux variant or another, though.

Windows has WSL, but otherwise it's a lot easier to run a lot of the CLI tools on a Mac, while still having access to a polished GUI and mainstream apps (Adobe and Microsoft, etc.)

[dismalaf]

Didn't say it's not big, only that Apple themselves build it to service their own ecosystem only. The fact it runs any of these tools is simply a result of the Unix-y core. If you want 100% compatibility with Linux tools, Linux is still the best bet (obviously).