I haven't seen anyone claim that it was hard to manufacture. Sadly, the answer seems to be that Robertson screwed up the initial licensing so badly that the te

I haven't seen anyone claim that it was hard to manufacture. Sadly, the answer seems to be that Robertson screwed up the initial licensing so badly that the technically worse Phillips took over the market. Here's an account: https://www.thomasnet.com/articles/hardware/robertson-screwdriver-history/ https://www.thomasnet.com/articles/hardware/robertson-screwd... Some people try to argue that Phillips was actually superior, since it cams out rather than breaks, but I feel like they are just making excuses. I'm confused why Robertson/Square is still so hard to find in the US. I don't think my local Home Depot carries any. Torx (which is just about as good) occupies the niche it would otherwise have.