"material that appears to be superior in every way"
Appear is the operative word.
It may remain that to you but I am convinced that once folk get over the initial buzz maybe some will see that no fabric can be best for all in every situation.
(this happened with spinnaker,Epic, eVent and various proprietary fabrics that have come and gone and will keep happening with every new fabric)
For example you will still will get misting ,probably more so than fabrics that absorb water .
If you like to spend some time inside the tent under the sun (afternoon nap or just to be away from insects and the sun) I am convinced that Cuben will be a lot less "superior" than silnylon.
Some , like me , also prefer a bit more privacy inside a shelter, so here again , to me, silnylon is better.
Also do keep in mind that silnylon has been used in tents for over 30 years so it may not be as bad as you think.
No doubt more manufacturers will use it at least as an experiment for a few runs but I don't expect any major player to switch entirely to it.
BTW, my comment has nothing to do with the shelter you should choose.
I use one and played with the other and I cannot see any similarities.
By that I mean that if you like one you probably will not like the other.
Franco



