What will it really cost for Google (each year) to host whatever was created, as static files, for as long as possible?

It'd probably cost a couple tens of dollars, and Google is simply too poor to afford that these days. They've spent all their money on AI and have nothing left

it's not the cost of hosting/sharing it. It's the cost employing people to maintain this alongside other google products.

So, at minimum, assuming there are 2 people maintaining this at google that probably means it would cost them $250k/yr in just payroll to keep this going. That's probably a very low ball estimate on the people involved but it still shows how expensive theses old products can be.