I had a 2016 Dell Xps 15" and both me and my coworker with the same machine had terrible issues with the keyboard randomly writing letters twice in a row. Also the on-board nvidia graphics card, while nice, was also a big power hog and that system had bad battery life until I turned it off. After a couple of years, the battery puffed up and started pushing up on the trackpad until it was unusable. Really soured me on Dell's build quality, and I can't recommend them at all, even though I admire their support for linux drivers.
You’d be better looking at the Precision line if you want a 15” Dell with Linux.
I agree, and I bet they will kick themselves for it in ~5 years time.
Technically, probably nothing unless you're tied to something like Final Cut. I like little things like obj (geometry), abc (geometry), and exr (image/textures) files can be previewed in Finder/Quickview out of the box. Quicktime is way better than what Windows offers by default (I miss Quicktime 7)--I'm not sure Windows can open Apple ProRes movies (a fairly common working format) without additional software.
ILM, Sony, Pixar, DreamWorks, and Disney aren't great examples since they all use Linux. For the few artists that need it, they have a second Windows or Mac box just for Photoshop. Because of their size they use Linux and a lot of in-house proprietary tools. There's like 10-30 companies in the world that work like this so it's not a great comparison for someone doing motion graphics bumpers for the web or making TV commercials--I would not recommend Linux for them.
What finally did it for me was when I did an "ls" in a terminal after an upgrade, accidentally hit the wrong button when the OS asked for permission, and locked my terminal out of file system access. Mac OS is no longer any good for professional use, outside of media creation.