How odd, maybe I'm just quite lucky then. To be fair I'm not doing any sort of dual-monitor setup. I just forgo my laptop screen entirely (close the lid) because I've found the one 4k to be plenty. Maybe if I started getting more complicated than that, things would get weird.
On Ubuntu the monitor needed much finagling to get working right, unlike my AOC or Asus 4k monitors which both worked when hotplugged using HDMI.
My coworkers, who aren't all devs, have more work to do in windows and they needed the special software.