Wikipedia could function forever without another donation if they wanted to.
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[1] https://slate.com/technology/2022/12/wikipedia-wikimedia-fou...
[2] https://www.dailydot.com/news/wikipedia-endownemnt-fundraisi...
[3] https://archive.ph/CClQ6 (this is a Washington Post article. I'm using the Archived link as it's paywall-free)
Wikipedia could function forever without another donation if they wanted to.