You might as well ask if anyone believes in alien anal probes. It's a scientific theory, a useful metaphor or explanation, and not a conspiracy theory or meant to be taken literally as an explanation for life, the universe, and everything.
It's the most useful explanation anyone's come up with for evolution yet, but there is actually a new theory in physics called Quantum Darwinism that suggests evolution is inherent in everything including the laws of nature themselves.
Google is your friend, but it's a very modern theory and there isn't much on it written for the lay person. Suffice it to say it makes no metaphysical assumptions whatsoever, has passed it's first test, and they're working on developing others.
I havnt heard the theory before but some peple ive met leave absolutly no other explaination