Hello,
My team is using ptxdist for several projects on several different boards and while
there are of course things that can be improved, we are very happy with it.
I have not used Yocto but have looked into it from time to time; my feeling is that
it raises the level of abstraction too much ("too much" for my personal preferences,
that is), thus making it difficult to see what is happening under the hood. I share
your feeling that Yocto is becoming "the Ubuntu of the embedded world".
The main good thing about Yocto is that it is becoming hugely popular and has a
very strong and active community. It would be great if the same would happen with
ptxdist :-)
Guillermo