I started working on cars in my dad's garage in 1970. He had always used SnapOn and after awhile I could see why. Even back then there were lots of cheap junk brands available. Mac, Proto and SK were also available back then. Everything I saw at that time from Craftsman was bad quality and construction.
What I noticed about SnapOn the most was that the tools were strong, fit the fasteners really well, and were trim enough to fit in places where other brands wouldn't fit. I had a small set of SnapOn tools of my own, mostly wrenches, sockets, wratchets and screwdrivers. I picked less expensive brands for other tools such as pliers, hammers, etc. I wasn't fully aware of the price difference until years later. When I figured out how much more expensive SnapOn was I stopped carrying mine in my trunk. At some point a little over 20 years ago I started buying Craftsman. I discovered that they were better made than before and actually worked well. I didn't use them every day but I found that they stood up to my use pretty well. At that time I had to buy sockets and wrenches in metric and SAE sizes which increases the cost. If I had to buy replacements right now I don't know what I would buy, I haven't looked closely at Cobalt or Husky wrenches.
The OP said he was missing some from his collection. I've found a lot of tools at flea markets, things like big tubs full of sockets. I wonder if a person could dig through these tubs and find quality tools such as the older Craftsman.