Philosophically speaking, it showed me that if you're counting the length of the college cafeteria using a tape measure, while everybody else is using a celery as a measuring stick, sooner or later, you'll have come down to a single celery stick too. And they'll cut it in half if you're going too fast.
But really, in 1989, that's how it felt when you had an Amiga at home and were forced to work on some sort of IBM compatible at school.
Windows is good enough for me nowadays, but the Amiga tought me to look over the cube wall so-to-speak.