I bought my tools starting at age 16. Then years later, I went to work at Boeing and went into debt for the required roll-away toolbox and their list of hand tools.

I would say that I do not use the vast majority of the size ranges. That applies to sockets, wrenches etc. I rarely if ever use any of my USA sizes, only metric. But that's just because I only work on my MB's. I have no interest in messing with the Chrysler minivan or the Toyota truck.

Tools are fun to buy, whether you really need them or not. I have more than a few of those.

Several people have mentioned theft. Here's a thought. A Boeing, that was a big problem. What we did was use an engraving tool to write our name and number on each piece. Back then it was probably SSN. Maybe phone no would be better today. Stolen tools are likely to be pawned and this might get them back.

Steve