I have the same intuition. It’s not all that different from an old codebase that runs on even older (and disintegrating) hardware. You may keep fixing things, adapt to mildly new requirements, change a tape deck here, a consensator there, but eventually the whole system is going to come down and has to be replaced - there’s nothing we know that lasts forever in a self-repairing way, and that’s what’s going to happen to our civilization. Telling by the worms and the beetles my guess is it’s a matter of decades, not centuries, hopefully not years. The only hope is that we’ve wisened up sufficiently till then to renew without completely getting annihilated or being back at cave-and-sticks level.