I feel like this was the origin story for the computer in I Have No Mouth, and I Must Scream.
The Video Game History Foundation conducted a study that showed that 87% of video games are commercially unavailable and therefore in danger from a preservationist point of view. To summarize, they want allowances built into copyright law to provide the same level of preservation and accessibility that other media, like books and movies, enjoy. The Completionist recently did a video on it with members of the foundation that talk about it: https://www.youtube.com/watch?v=UyhsZE6QIJ4
Nerrel also has a good video that touches on how emulation is a gray area with court case rulings that contradict on another: https://youtu.be/yj9Gk84jRiE
Facebook rebranded to Meta and burned $13 billion on the "metaverse" to stay relevant. So, Facebook doesn't seem to think that Facebook will be around forever. Reddit does have critical mass, which is an advantage for them. There's no denying that. But, it's their advantage to waste by being overly aggressive and greedy, which they seem to be happy to do.
As for Google searches, it might be less that Reddit is so valuable for search and more that Google has become so bad at providing good search results that Reddit became the go between. There's a lot of very specific knowledge on Reddit, but there's also a lot of redirects from Reddit comments to outside sources that have the info that a Google search should be able to provide. I don't know if Google has the will to fix that problem though. If Reddit can "get back to normal" and continue being Google's sidekick, Google might be happy to return to the status quo. But, once a company like Reddit adopts the policy that "the beatings will continue until morale improves," it's hard to imagine how they can get back to "normal."
It's even worse than that. The only way to back up save files for games like Animal Crossing, which can represent a ton of playtime, is to pay for their online service. The save games aren't saved to the cartridge like they were with 3ds and you can't back up saves locally on the SD card either.