I liked the answer of pb +
Mainly for people that don't know
enough JS
I believe it is too complicated for them, so they use this excuse. FW allows you to build much more complex applications.
Frameworks limit Javascript developers
bullshit
Frameworks bloat the actual
development code with a lot of things
that are not used.
what is it today extra 100k-200k? especially if you use the CDN versions (at google for instance). And this is assuming you use nothing in the FW.