Topic: deprecated ??

I note in the debug output from a site I'm working on using xajax that is deprecated in favor of xajax.request.  I have a substantial number of sites - as in at least half a dozen - that use multiple invocations of, and it would be a total downer to have to go in and re-program all these sites because was dropped by the developers in a subsequent upgrade to, say, xajax 0.6.  This would leave all these sites high and dry (and very broken!).  Please tell me it isn't so!!