Let that company and all its projects die, and the quicker the better. Facebook/Meta is just one Big Brother out of several that needs to be blown out of the water.
I doubt that this failure alone could become Facebook's undoing, but it could be a step towards it. Facebook is still too big to fail, but if it continues to be mismanaged and competition would provide better alternatives to online socializing, it could decline significantly in 10-15 years.
I know it's been a long time since Zuckerberg "created" Facebook, but maybe he's let things go to his head and thinks he can create demand for something like that. But whatever the case may be, it sounds like Meta investors aren't happy with the black hole those billions of dollars are going into. I mean Jesus, that's a lot of money for any company to be spending on R&D, and if it's not clear to shareholders exactly what the money is being spent on....there's a big investor-relations problem there.
Maybe 15 billion is not a massive sum for a company like Meta, but the fact that it's spent on overly-ambitious project with low chance of success and in an untransparent way, that's certainly a bad sign for investors.