I don't think it's particularly common for techies to upgrade the screen, just that they are the only ones who would because... well, upgrading a screen usually isn't ever needed. The only reason I did is work was offloading some good laptops for low cost but they had sub-1080p screens. I took one with a broken screen for free and when I did the replacement I used a higher end model's replacement part.

I.e. the only different part is finding a laptop of the same screen size and eDP (embedded Display Port) generation to select from. The rest is the same. If you've already got a good screen it's usually not possible though as you're limited by the eDP generation's speed instead of the panel.