Jake, I don't think many clients explicitly ask for xPages development, they ask for a solution. By that reasoning you never have to learn or use xPages. It is up to us developers to keep up with technology to see if newer technology allows us to do thing better or quicker.
I know I don't have to tell you this as you always have been trying out new stuff and sharing it, I'm just saying that your logic of waiting for an explicit xPages request before using it does not make sense if you're into Domino for the long run. But then again, you have questioned that assumption, and with a busy life I can perfectly understand one has to choose which technology to learn.
Anyway, I've always found this site useful, fun and personal. It may not be technical blog it once was, buy you should take great pride in such an enormous archive of quality material.