There is a downside to that is well though they also get bigger heavier and a hell of a lot more complex it starts to become a pain when you cant even change a cars battery without having to hook it up to a computer

Then you start replacing dipsticks with sensors and removing temp gauges it becomes a bit of a disaster

Iv been in a couple of old cars though (pre 90's) and wasn't too impressed either definitely would not want to drive them everyday