"A fully server side rendered version with isomorphic JS and a shared data model"

Seriously, how did we get there? Having dealt with jsp, jsf (myfaces, trinidad, adf...), asp.net, asp mvc, angular, plain html/css/js, how is is possible for FE web dev to be such a mess? So much complexity, for what? How many have to deal with millions of visit per day? Or even month? It seems to me history is quickly forgotten and new generations know very little about the past.

Keep it simple, please.