So now that this powerful user is gone and the software is still out of convention, we are stuck with an unfriendly behavior on an extremely popular software because of.... Inertia and this makes a cool story?
I know, right? The Dutch version of Wikipedia says he's worked at Microsoft since 1992. You're bound to hear some interesting stories during that time.
(Somewhat surprisingly, the English version of Wikipedia does not have an article about him. Raymond Chen (Microsoft) redirects to an article about the now-defunct Microsoft Developer Network, which mentions him once, in passing.)
Wasn't <f3> the conventional shortcut for app search back in the DOS days? So it makes sense in a backwards compatible way, while still being an annoying anachronism.