Thank you for the excellent and succinct answer!
> My question is then: why are people purposely choosing not to use the advantages of client side MVC code?
I didn't understand this question (it seemed too obvious to me and felt like a bait to get into a broader discussion). In both Ember and Angular apps you still have a 'model' that is stored outside of the DOM, the only difference is how the model is works, which seems orthogonal to 'advantages of client-side MVC.'
I wonder, though this is speculation, if this question and post are some kind of elaborate troll. EvilTrout hails from Forumwarz, which is a game that may use these techniques every day:
Forumwarz is a parody role-playing game that takes place on the Internet. In fact, Forumwarz is the Internet...in game form.
Magical dragon-faeries? Flaxen-hair'd elflords? Dank scary dungeons, reminiscent of Grandpa's basement? Kids' stuff. In Forumwarz, you can pwn trolls in ridiculous web forums...buy hacked warez from shady Russian websites...or upgrade your skills with breast implants, malt liquor and antidepressants.