For me:

1. A huge catalog of apps and games, old and new, that are mostly windows and linux, but all exclusively x86.

2. I don't want to get locked in to an ecosystem with no variety. For example, if Dell's offering laptop has a keyboard I hate or poor selection of ports, then I can switch to Lenovo or HP or go for a gaming laptop with an Nvidia GPU and use it to train NN, etc, the variety is amazing. While if Apple's next machine has a flaw I dislike, then too frikin bad, I'll be stuck with whatever Apple bestowes upon me.

I cannot speak for OP, but software is the reason for me. I can not run Solidworks on MacOS without bootcamp or other tricks, for example. Photogrammetry apps? GIS apps? CNC CAM apps? I mean, compare the Mac[1] compatible apps to the catalog of Apps Autodesk has.

The fact of the matter is GPU support on MacOS is just not there in the same way it is with windows. It is really hard to justify the price of Apple when you compare directly to Windows offerings spec for spec. When you compare the sheer volume of software available for Windows as compared to MacOS, especially if you need a discrete GPU there are really no comparisons.

[1]https://www.autodesk.com/solutions/mac-compatible-software

Price for one, also I still consider PC and Linux (and god heavens even windows) more open than Mac. I also work with many windows-only automation software.