For me, Ext was the bridge between Flex/flash development to more native SPA programming after Steve Jobs decided it would kill Flash. It held my hand as I lea

For me, Ext was the bridge between Flex/flash development to more native SPA programming after Steve Jobs decided it would kill Flash. It held my hand as I learned Javascript, and it gave me the space to fail when I realized I couldn't use for-in in a javascript app. It also hid away the core functionality under such a huge layer of abstractions that it was impossible to debug anything in the framework. I loved Ext though.