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You are conflating many things that are simultaneously arbitrary and confused. What “templates” do you think are actually necessary, as opposed to being an arbitrary overcomplex way of doing things? Twitter is a relatively trivial application from a UI perspective.
I mean, traditionally, the way client/server systems work is that the server does the server part and the client does the client part. Having the server do the client part is a bad idea in terms of efficiency as well as quality of experience for the end-user.
The genesis of this whole discussion is the assertion that web people make easy things difficult and slow and have no idea they are doing that because they don’t understand simple and fast, and ... you are kind of just helping to prove the point.
web devs: "must go faster, must go faster - need to make *more* shit faster"... the world: "woah, you're making more *shit* faster... and it's all getting slower!"... web devs: "can't hear you over the sound of MAKING SHIT EVEN FASTER!"
You can say that, but what is the client part really. Today we use the client for a lot of stuff, that not too long ago, was clearly the server's responsibility. I could argue that it has reached the point that it's not a client anymore - it has become a server node.
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