Here is an interesting fact from an article on open-source software in the United Kingdom:
“Researchers found a staggering 97% of the 273 UK businesses surveyed use some form of open source software.”
What does this mean?
Assuming that all 273 businesses are connected to the Web (even the uncompromisingly Victorian James Smith & Sons umbrella shop has a Web site these days), it means that 3% are still using Internet Explorer. All other Web browsers* are based on open-source rendering engines, so if you access the Web at all, you are using some form of open-source software.
Are you still staggered?
*It is technically possible for one or two of these companies to be using an ancient proprietary browser from the Paleolithic era of the Internet, but the possibility is remote.