2005 - 1999 = 6 < 10, not "decades"
also even if the UC Berkeley removed that clause, some other people have NOT removed it. And UCB has no rights to change others' licenses, especially when it isn't a BSD derivative.
This is similar as Linux (the kernel, not GNU/Linux), which is released under GPL version 2 only (not "either version 2 of the license, or (at your option) any later version"). Even if FSF released a newer version of GPL, it has no effective to Linux unless it's adopted by Linus and other authors of Linux.