I think the problem is that most single page apps are badly designed. Each resource must have a unique URI or the original web model (as envisioned by TBL) is

I think the problem is that most single page apps are badly designed. Each resource must have a unique URI or the original web model (as envisioned by TBL) is broken. This can be, and in many cases has been (google plus for instance), solved. It's just a matter of good design.