Why isn't Python king of the hill?

[Mark H]

The more I use Python, the more I wonder why it hasn't taken the wind
out of Java's sails?  Now, don't get me wrong, I love Java, but I have
found I am at least twice as productive in Python than Java, and there
seems to be very little if anything that you cannot do in Python or a
Python extension.  Is it because Java has a few big companies behind
it while Python doesn't?

Just wondering.