The toolchain part is pretty broad: this includes OS services (audio routing!), outboard hardware, DAWs and video editors, and third party plugins.
When comparing macOS vs. Windows for audio, macOS wins for most people on those axes. Apple wins on OS services (audio routing is super annoying on windows) and on outboard hardware (USB3 works okay, but Thunderbolt is better, and it's a pain to get configured on a Windows machine). DAWs is mostly a wash with the exception of Logic, and third party plugins is a total wash.
Even given that, Logic plays a strategic role in that ecosystem for Apple. As the more expensive option, Apple always runs the risk of being the secondary platform for application authors. Without Logic, other DAW vendors could be free to neglect their offerings on Mac. That ecosystem is healthy right now, but Logic is a key hedge.
Oh, and lock-in is a big thing, too. Logic users may be a minority, but they're firmly locked into the Mac in a way that Reaper users aren't.
Video is different. Many video creatives have made the switch to windows. There were two key reasons they have jumped:
1. Hardware. The Mac Pro was neglected for years, and third party graphics card support has always been better on Windows. Performance isn't paramount, but it does matter.
2. Final Cut Pro X. This completely changed the editing model from under a lot of pros, requiring them to completely rethink their workflows. Since this happened at the same time that hardware support was really bad, a lot of pros thought, "Well, if I'm going to have to rethink my workflow anyway..." It loosened lock-in at a time when the other parts of the platform were pretty weak.
Specifically I'd like to have application A and B play to speakers, and have an output I can record that has application A and my microphone, without sending application B to that output or my microphone to my speakers.
At least to me, this is what "audio routing" implies, so it'd be great if this feature was there and I'd just missed it.
macOS also has the capability to create an aggregate audio device from multiple devices. That's a pretty niche scenario, but I used it and I haven't been able to get something like that working on Windows at all. The fix was to shell out more $$$ to expand the inputs on my interface.
But you can pay money for apps that make it happen, and you can also Homebrew free options like BlackHole. (SoundFlower used to do this, but the more recent MacOS security updates seem to have nuked it.)
On the Mac, you want something like Logic to run, you just go into the Logic preferences, set the output device and the buffer size. You get the low latency you want and other apps are free to use the same device as well. It's the only platform where I consistently get both "all the apps just work without messing with it" and "the pro apps have low latency".
If you want desktop audio recording you can install iShowU or one of the others.
As Windows 10 leads us to the subscription based computer that exists to apply updates as a primary function, that distinction may disappear.
It's an older paper, but the general direction still holds up today:
https://www.researchgate.net/publication/267780532_Audio_lat...
This thought pattern transcended the PowerPC processor, to the off-the-shelf Intel processors that the competitors used, to the ARM processors the mobile devices used.
Apple continuing that perception with at least software updates can continue to cement their hegemony amongst the minds of people.
They're also good machines without the fluff! But merely showing support for that perception can help retain the premium pricing when even artists across the entire socioeconomic spectrum (heavily weighted to one side) will still prioritize getting Apple devices over other expenses, or at least aspire to and talk about those dreams.