They're so computerized you can't do sheet to fix them yourself and all the mechanics at the dealership know to do is hook them up to a computer and start switching parts until they get it to work.
Are you OK with all the computerized technology and A&P mechanics who work on and keep America's commercial jet fleet flying safely? This is the 21st Century and all. I would not want to go back. I have a 1965 V8 289 Mustang with points and condenser I can piddle with whenever I get the urge.
Or my 2012 Porsche Panamera Turbo V8 which I have to take to the shop for professional piddling!