I grew up before Windows - an Amstrad PC1640 - I had a lot of fun getting a plotter working on that. I like LPT ports, there again I like Victorian Engineering (probably for the same reasons).I am in my comfort zone with Mach3 and XP, but when that PC packs up it may very well be GRBL. I built a laser cutter and run it on GRBL and am starting to get familiar with it. Not quite what I want for a CNC mill, but I am only an amateur hobbyist and I like doing things on the cheap.