Nothing there to argue with, but we all have an idea of what we want and a coachbuilt isn't in my future, and I don't know what an electric auto is.
An electric auto is either a 'comfortmatic' or a modern automatic which is a DSG (Dual Selector Gearbox) . Comfortmatics are so bad they do not deserve to have electrons wasted explaining how they work. Or don't, which is more often. The DSG gearbox is one where an electronic computer decides which gear you will want next, it selects it but only operates that gear's clutch to engage it when the balance between the engine revs and the accelerator position are in harmony. In other words, at any time two gears are meshed together, but only one is attached to the driving wheels. Each of the ~7 or ~9 gears has its own clutch and they are engaged or disengaged according to the computer which decides on the appropriate one. I had a VW Golf with this system. It worked wonderfully but the more I looked at Youtubes on how they work and the cost / intricacy of servicing them at regular intervals made me sell it while the going was good. They are one of those "If it lasts a long time it is wonderful but if it doesn't, bang goes your bank account as well as the gearbox" things. It uses very specific oil or it won't work. It would appear that the oil and filter to do a DSG gearbox service cost about £150 for the parts. Plus labour if you don't do it yourself, and if you think you can make sure before you start by looking at a Youtube. Best get a quote for the job.
Whereas on an old type Borg Warner or ZF all you have to do is drain the old oil, undo ten or twelve sump bolts, remove the sump, then three bolts removes the flat pancake filter, fit a new filter, refit the sump, refill with oil and drive away having spent £30 on oil and £25 for the filter . . . . .
I would add that I am a great fan of automatic gearboxes (proper ones, that is). My son in law had a manual box Mondeo which needed a new clutch. Ten years ago it cost £1600, I don't know what it would cost now. The only time I have known a Borg Warner or ZF box to need replacing was when I was in Madeira and I asked a 1983 taxi driver with an auto box how many km it had done. 1,500,000 approx. "And have you had a new engine or gearbox?" Yes, I had a replacement gearbox once, at about 700,000 km.
Nuff said.