Because it's had more time to find flaws, and needs, and make the changes and have time to make sure the fixes are the best way to handle an issue. I have assumed that there isn't a lot of sharing among the big guys, with what they've learned and how to counter problems.

Businesses are always touting, "been in business since 1949" or "longer than any other" because there is that sense that they've been around the block a few times more than the new guy.