Meanwhile, I program in an environment that highlights my line in red if I leave a syntax error in place for more than three seconds. What a different world.

(And before someone says it, yes, the programming languages have come quite far, too. Drop back to a 1970s general purpose programming language for a week if you don't believe me.)

THINK Pascal was doing this on the Mac in the mid 1980s... TP was an amazing piece of engineering given its functionality and the environment it provided.