[ci5er]

> that we had the separation of concerns wrong.

Well, yeah. Forgive me, because I never know, here, if I am talking to my grand-son or my grand-pa, but "Separation of concerns", as an idea, came up when we thought that HTML/JS/CSS was about describing web-sites, for, for example, the NYT vs the WSJ, not for an applet or Swing replacement.

Separating content (including, maybe, semantics too) from presentation (branding, look&feel) makes sense when you are talking about web-pages. I don't even know how the idea transmogrified into a point-of-contention on SPAs.

It's quite funny when you think about it: "Look, Ma! I can build a fully functioning GUI out of type-setting elements and sticks!"