The lockup torque converter combined with 5+ gear automatics have negated-to-reversed the MPG / KPL statement.
That's certainly possible. My newest car is approximately 15 years old, so it doesn't apply to me (yet).
A manual takes 80w90 gear oil
Most manuals do. I used to have a 91 Mazda that took dextron III mercon.
(worst case of electronics failure is you can't access reverse, or you can when going at highway speeds)
I think that most manuals still use a mechanical cam in the shifter assembly for that.
Plus, modern materials have given much longer life to manual clutches. If you are gentle on the clutch, it can last the life of a car build after 2000-ish,
I think it really depends on driving conditions, the driver and what you consider to be the "life of the car". Will a clutch go 100,000 miles? In most cases, sure. But get to 150,000 miles in mainly stop-and-go city driving and you'll be replacing a clutch.
An electronics failure in an automatic means your car is being towed or it's stuck in first or second (limp home mode).
Yep, "limp mode" in an auto really sucks. I once drove my car on three cylinders for two weeks while waiting to get a replacement for a bad fuel injector, I would hate to think of how much worse it would have been with an auto in limp mode. And before you say it, no this does not damage the catalytic converter, the fuel injector had a burned out coil so it remained closed *not* putting fuel into the cylinder, and therefore not pushing extra fuel through to the exhaust to be burned off by the catalytic converter.