Python - Web Display Technology

[SamFeltus]

I am trying to figure out why so little web development in Python uses
Flash as a display technology.  It seems most Python applications
choose HTML/CSS/JS as the display technology, yet Flash is a far more
powerful and elegant display technology.  On the other hand, HTML/JS
seems clunky and antiquated.  I am a gardener, and not a coder by
trade, but Flash seems to integrate just fine with Python.  Anyways,
what are the technical reasons for this?

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