Henry Ford II and Harry Ferguson got into a big p*ssing match in the late '40s over the three-point hitch. It wound up being resolved in the '50s, by court decision and with the expiration of the hitch patent. Deere went to IH and asked to license the Fast-Hitch design at about that time; IH refused to license it, so Deere added the three-point hitch to its equipment. Once Deere added the three-point, you had #1 in the tractor market with FH but #2 and #3 with three-point, and Harry Ferguson had ramped up his own tractor production by this time, so he was also building three-point tractors. The three-point won out due to sheer production numbers and interchangeability of implements between tractor brands. If IH had licensed the FH to Deere, everyone might have a FH on the back of their tractor today.
I feel the Snap-Coupler and the Fast-Hitch are superior to the three-point.