Granted, for desktops, x86-64 still has a lead in performance, but it's impossible to max out an Intel-powered laptop for more than 2 hours on battery power. Getting close to that level of performance, but without the horrible fan noise and burning lap is much more preferable to me.
The entire Pro lineup - laptops, tablets and phones - all have 120Hz displays. I would fault them for releasing the 60Hz Studio Display, but it is literally impossible to source a 5K panel with higher refresh rates at this time of writing.
External monitor support being shit - honestly not my experience, but OK - is more likely to be a byproduct of limited USB-C bandwidth, which you can work around using Thunderbolt docks or the built-in HDMI port. I will agree that Windows handles multiple monitors much better than Mac OS though.