The skr is a 32 bit controller that can run marlin 2.0. 32 bit controllers are great for cartesian printers also as we chase print speeds or multi filament printing or anything that requires any kind of math or thought on the part of the controller. The old controllers when they would get loaded up they would studder resulting in strange and hard to isolate and sometimes seemingly random artifacts or imperfections in our prints. Here is a very informative video on the skr 1.3 and its setup: https://www.youtube.com/watch?v=duNHOPlh2Pg&t=