I don’t know the answers to those questions. Maybe with the lower price point they expect the 3 to be purchased by more people who are not familiar with amperage of the circuit they are using (renters, non-ev enthusiasts, etc). Just a guess...I ask because I am putting in a NEMA 14-50. You say it is for safety reasons, so are they limiting all future S/X UMC's to the same 32 amp? If not, I do not see why they have done it to the 3's UMC.