Excellent CI+Xajax Resource/Examples!!

[eluser]charlieD[/eluser]
Just wondering, what are the advantages of using a library like xajax rather than write the Javascript yourself? With some of the brilliant JS libraries out there you wouldn't have to write any more code (maybe even less) than xajax, and it seems like a better way of separating behaviour and a better starting point for making your applications more accessible.