It's unclear what your point is. Are you suggesting wikipedia shouldn't also have citations to content published online, simply because it might be removed?
There are 81 citations. Of these, only 9 are not citing published books with an ISBN, or articles published in journals.
4 are citations to papers or articles published by physics professors on their university websites (Berkeley, Riverside, CUNY, Caltech)
Three are links to magazines: Quanta Magazine, Scientific American, Physics World
The remaining two are a link to the Nobel Foundation (regarding a nobel prize award) and a link to Merriam-Webster for a definition of "Quantum."
> At best you can get some people's opinion about something.
Nah, not even close.
Cherry picking can only occur if I'm generalizing, and I am not. Counter-examples aren't cherry-picking.
Your statement "At best you can get some people's opinion about something" has been disproven.
In terms of book references Wikipedia simply wins, hands down. Those don't rot.