How much planned MX does that electrical system have in the Porsche? Basically, electrical systems are rarely if ever maintained in cars. So of course when they break, they are going to be an issue.Actually, with piston engines, 90% of engine troubles tend to be electrical. Ignition is a far bigger problem than fuel delivery. In 1969 my high-school Power Mechanics teacher told us that, and I have found that to be absolutely true. Even in modern cars it's the electrical stuff that makes trouble. How often does an engine throw a rod unless it's run out of oil? How often does a valve burn? It's rare. It's the electrical stuff that matters, and all that computerized stuff has had to be built really tough and shielded against interference and sealed against foreign matter intrusion.
The electric motor is indeed simple. One moving part riding in a couple of bearings. But the rest of the system has thousands of connections in the supply and in the electronic controls, and that's where the troubles will arise. Batteries have their own idiosyncrasies as well, no better than fuel sloshing in a tank. The designers will have to take into account all possible effects of atmospheric pressures, ambient and engine temperatures, vibration, heating of the various components, pilot habits, and so on. If they don't, the unforeseen consequences could be very serious.
Determining actual power levels in batteries is difficult. It's inferred from battery voltage, but as the battery ages (or gets cold) that inference becomes pretty inaccurate. Voltage and available amperage are two different things.
I'm not dissing electric airplanes. I just don't want people learning things the hard way like our predecessors did 100 years ago. General aviation is already over-regulated and has a poor public image, and poorly-implemented new technology risks making both of those worse.
Think about it; the vast majority of the maintenance on a piston engine is "regular/scheduled" maintenance dealing with mechanical systems. The vast majority of exceptions are known mechanical failures; water pump, radiators, oil pumps....
There is a reason why a lot of economists are predicting a new industry to replace the interior of a car since the EV power train will outlast the interior by a significant margin. While in an ICE, they tend go go around the same time (in general). At the same time, the economists and math models are predicting massive loss of mechanics due to a lack of work for them to perform on an EV.
The same will apply to electric airplanes.