The thing that depresses me the most about Wiki[mp]edia is that the US$ 100 that I donated to them a few years ago (presumably,) predominantly went into creating material like this. Given how incredibly well-funded Wikimedia is, their yearly extort^Wdonation-drive with 50%+ viewport-sized banners plastered all over Wikipedia, claiming that the encyclopedia you're viewing is in dire need of your money to barely sustai…
Wikimedia has sufficient assets to host Wikipedia in perpetuity ($91 million @ 4 percent withdrawal rate = $3.64 million, ~$1 million above their current hosting tech and people costs). As long as Wikipedia text and media dumps are archived in the Internet Archive, it's not going to disappear even if Wikimedia Foundation goes defunct. No further fundraising is required, ever, if properly managed.
On top of that, assuming they will have zero effective cost increases is wrong. There is so much growth left in content and users. How much has Wikipedia grown in the last five years? How well do they cover non English languages? What if they had the same size article base in English as every other language? What if every internet connected user could use Wikipedia?
Saying we could freeze Wikipedia costs in 2019 based on $90M in the bank is shortsighted.
The page on The Wikimedia Endowment is actually quite interesting if you're into finance and investing - https://meta.wikimedia.org/wiki/Wikimedia_Endowment.