I agree, I've learned a lot here and I really appreciate everyones help over the years... One thing about this site I really enjoy is when people post multiple solutions to the same problem.
Everyone mentioning other social platforms available today makes me think of sites like Wordpress, Drupal, CMSMS, phpBB, WuFoo, etc, etc... If you need something you just download a module or plugin. I guess when I first came here a lot people were building all of those modules/plugins/sites on their own.
The only sites I frequent now are stackoverflow, css-tricks, iprodeveloper, zend, code-pen, daniweb, php-freaks(rarely) and here of course.
I still think the new site & load times are playing a small role. JMO