The downside for me is the older ones can't drive high res displays at a decent refresh rate. I have a (single) 4k monitor for windows gaming, but I use it a to

The downside for me is the older ones can't drive high res displays at a decent refresh rate. I have a (single) 4k monitor for windows gaming, but I use it a ton with my (company) 2015 macbook pro for work/development, which works great so long as you use thunderbolt -> displayport. Using my personal 2013 macbook pro (13in) with the monitor is a freaking nightmare. It just can't handle the higher res monitor, the mouse looks like its moving in slow motion. Same story on the 2015 macbook pro via hdmi. This on its own will be a huge factor when/if I replace my personal laptop. I'm gonna hold on to it for as long as I can though...