This is hacker news, so presumably we are hackers. I like being able to look into the system I'm running. When I'm seeing a weird network issue, I want to be able to peer into the kernel's tcp stack. When I see an error, I want to be able to add debug statements and understand it.

That's easy to do on linux. There's great tooling. That's hard to do on macOS.

I run websites and services. I like being able to run them locally, to try and reproduce bugs I see on my server. You can't run macOS on a server in a reasonable way, so the only reasonable choice there is linux.

I can understand how someone who doesn't really want to understand the software they use might want to use macOS or windows. On hacker news, I'd expect most people to understand the desire to be able to tinker and understand the system to a greater degree.