> Currents then took parts as far as the Maldives/Sri Lanka, IIRC

Some bits ended up on a beach of the Réunion island, closer to Madagascar than Sri Lanka. I am not disagreeing, it’s just that the whole story is fascinating. It’s easy to think "well, it just crashed into the sea so of course some bits would show up on a beach" until you look at the Indian Ocean with a proper projection and figure the scale.

Floating is a powerful physical configuration! You get currents plus windspeed. If you're in to this sort of thing, I can recommend The Seacraft of Prehistory, We: The Navigators, and Archaeology of the Boat approximately in that order.