Can you explain to me how unsexy problems like browser incompatibilities (yes a major pain) lie anywhere within the scope of webpy? Those seem to lie within the scope of the templating system and js library that you choose.

A larger, more complex framework does present serious problems when you have to architecture everything in strange ways to meet scaling needs or otherwise.

Note how much the twitter guys were so scared by ROR's complexity that they resisted doing the most trivial modifications? I want to understand my framework "all the way down." This is much the same reason I use linux.