I won't argue that its a balance. With "electric" airplanes, it isn't exactly feasible to know the ins and outs of values that change - just like I couldn't tell you what the IAS was in knots for barber pole at FL190 on an ISA+10 day, but I do know its .48M. Rather its better to know how the logic works in that situation. There's a lot going on in the jet, and knowing how to interpret some cryptic message from the computer - or what the computer is thinking is probably more important than knowing how to figure out what the real redline is - that said, in a lot of less advanced machines, arming yourself with as much information as possible can be handy. Mnemonics, and practice help - you don't have to be able to build the thing but if its a Lim or an EP it should be known.
