Yep. And what I’ve also noticed is ever since the mid 80s and ODB one and two, all you have to do is read the codes and your car tells you what’s broken. Well in a lot of cases it does. I learned that old key turning trick with my Chryslers and was able to fix all sorts of cheap problems there would have been almost impossible to diagnose otherwise.
If you don’t have good computer software and an OBD-II cable you can’t work on a modern car. Or an OBD-II dongle I guess, and a smartphone or better yet a tablet. Lots of folks going that route. I bought a Bluedriver one recently.