Play tectonics is pretty well studied, plus you got the whole part where the sun becomes a red giant and annihilates the planet. I bet Randall worked it out pretty well.
Back of the envelope it’s about 10^17 seconds, which works out a few billion years. He drew it with some wiggle area, so anywhere from hundreds of millions to several billions which covers the range of plate tectonics and the Earth being consumed by the sun.
So it seems pretty accurate
Yessssssss. Mine has this and it’s amazing.