I use Archive.org a lot, to view the status of web sites years ago. It’s an invaluable and free service.
The stress should go on “free“, however more often than ever I find this free service to be unavailable.
This statement comes up often, recently, when trying to view snapshots from 2002 or earlier:
“Bummer. The machine that serves this file is down. We’re working on it.”
Luckily, there is also Screenshots.com but they’re limited to a single image capture, versus actual storing of web page content like Archive.org.