It's all part of the cycle innit..? Newcomers, new ideas, etc will naturally come to replace ageing concepts and popularity-induced cold feet.
Just like SMF. Wedge is the next part of the cycle. Something else will be the next part, etc.
jQuery is also looking like it's going into this cycle. Maybe NOT for bad reasons, though! To me, jQuery is just what JS should have been from the start, it should be integrated into the language and maybe not any features in the future, that's what 'plugins' are for...
WordPress doesn't look like it's been in that cycle, though. Sure I missed the 1.x/2.x development but it's always ma.tt overseeing the project, so I guess he handled it beautifully, whatever one may want to say about WP...