Re: For Pro 2 users it may be time to upgrade
To expand on my previous post, we previously used a Plugable Docking Station with our Surface Pro 2's very successfully. Now I'm using the MS Surface Dock with Pro 4's. I ran into a significant problem because we use HP Pavilion 23tm touch screen monitors 1920 x 1080, 16:9.
Because of the 3:2 screen on the SP4, the settings had to be set to turn off the SP4's screen in order to take advantage of the monitor's screen size - no big deal. But the screen would freeze up on a regular basis, and after rebooting there was no error log information.
After hours of busily adjusting settings, looking at taskmanager after freezes, etc., what eliminated the freezing was to disconnect the USB plug providing the touchscreen function. I didn't use that function but my wife is irked as she used it regularly. I doubt I will be able to make that function work.