It's a heuristic. A single counterargument does not disprove it. It just shows that it's not a law, which was obvious to begin with.

When? If we experience a civilisation collapse.

It's the same thing. horse-drawn carriages are automobile. Today's car is a more advanced version. In a sense, today's laptop is a spaceship comparing to the first laptop.

Technically, a car is a spaceship compared to a carriage.. one Tesla in particular.

Now I’m wondering if we should differentiate between “spaceships” and “space boats” by whether or not they hold air…