But none of that code runs on Mac alone. Even if they're developing on a Max their python or Julia or whatever code that they want to run on the cloud will run

But none of that code runs on Mac alone. Even if they're developing on a Max their python or Julia or whatever code that they want to run on the cloud will run on Linux. The only real use case out there is building/testing iOS/Mac applications. The only other one I can think of is a Mac only video editing or animation software that you'd prefer to render somewhere besides your laptop.