It's still a maintenance light for many things. If you check over the list of diagnostic codes for any given model, they vary widely from a "should check this o

It's still a maintenance light for many things. If you check over the list of diagnostic codes for any given model, they vary widely from a "should check this out next time it's convenient, something looks off" all the way to "PULL OVER RIGHT NOW." I'm old enough that I remember when it was commonplace to figure out what on earth your car was even mad about that you had to take it to a mechanic and pay for the privilege. That's one aspect I will absolutely give has improved both to new cars' infotainment systems that can give much more detailed information about what's wrong, and to the wide-spread adoption of DTC decoding devices/apps.