That's not entirely correct. It takes a day to pick up and a week to master :-). Well, it does take a little longer to learn all the nuances. Also, I've used this pattern in my personal apps (and for one app at work) and sometimes I felt that I needed to use a front end lib for a page, but after thinking about it I learned that I still didn't need a front end lib as hypermedia covered my needs.

I do agree there are times that a traditional front end lib might be needed but it is much rarer than we think.