Zip2 changed the way the businesses and customers found each other entirely. It was literally the replacement to the phone book, and first place where if you wanted to find a business you could just search categories in an online database and find numbers and addresses... PayPal impact was pretty obvious... Tesla breathed life into a virtually nonexistent EV market and has held like 3/3rds or more of the market share for over a decade. It's also at the forefront of both home and grid level energy storage... Then SpaceX literally privatized the space industry and changed the way that space vehicles made.