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"As far as (non-mission critical)web frameworks go, I think these days you have two options: Python/Django and Ruby/Rails."

I wonder what the author means by "non-mission critical?" Someone considering writing a web app in Django/Rails that is used by thousands of customers might be scared off by that statement.

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I read this to mean that after some level of complexity all generic frameworks break down, you have to rewrite parts of them to better address your requirements, be it functional or performance related. It's not a coincidence that some of the largest Python web shops build on top of Pylons instead of Django as it has smaller footprint and it's easier to customize.

I have always thought that "mission critical" software means that if something goes wrong, a human being might get hurt (ie: heavy machinery, missiles, etc.)

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