+1 on the CNC machining. Materials technology has also greatly advanced.I think guns have progressed like computers and get amazingly better every year. CNC machining is amazing.
We all love to drool over those old masterpieces that required a lot of hand fitting and some of us, myself included, will pay more to get one of the old classics, but my experience with new Rugers, Springfields, Savages and so on has all been positive. Can't say my old Rugers shoot any better or work any better than all the new Rugers I've bought the last couple of years. From the standpoint of a shooter, I'd say the new stuff is better than ever.