I used to use a 5 year old NUC until one day Windows decided to disable my Bluetooth, and nothing I did was able to restore it. So I got a new M1 Mac mini as a replacement.
If you plan to use it with Zwift, check the Zwift compatibility. Zwift use hardware specific profiles to determine what level of graphics it utilizes, so just because the NUC could do 4K doesn’t mean that Zwift will output this. For a perfect example of this see DCRainmaker’s review of the new Apple TV and Zwift