Thought experiment: a company buying google (10, 20, 50 years hence) would be much bigger and may not care about tiny revenue streams.

That assumes that Google's search ad revenue, and perhaps their growing application service provider revenue, are going to be tiny relative to this hypothetical acquiring company's revenue.

It seems absurd now, but on those timelines you could be right. If nothing else, a lot can change in 10-50 years.