Bloody plate tectonics! When you watch geo[thingie] at this speed you start to appreciate how there is no such thing as terra firma. Take the UK and Ireland - thanks to sea level changes it expands and contracts pretty madly and that's only change in one dimension. At several points it was part of the European land mass and faster than you can say Brexit the Dogger bank floods over and Neanderthals got wet feet.
If you also tried to follow land, you'd have to account for subduction and whatever the opposite of that is on continental scales and land created by volcanoes and lost by volcanoes exploding etc on a smaller scale.
Absolutely. I'm certainly not a geologist and I know it's clearly not a 1:1 mapping, but certainly some thing can be said about, say the India shaped floating land mass that drifts towards where India is located in the past 100 million years and if you wanted to say where Mumbai was, the answer, if there is one, is probably found somewhere on that giant island and not at the exact place it is today
If you also tried to follow land, you'd have to account for subduction and whatever the opposite of that is on continental scales and land created by volcanoes and lost by volcanoes exploding etc on a smaller scale.