Looking at the video, and assuming that indeed that's how a Type II->Type III civilization spreads around, I've counted 2 full rotations of the original star. O

Looking at the video, and assuming that indeed that's how a Type II->Type III civilization spreads around, I've counted 2 full rotations of the original star. One rotation in our galaxy takes 230 million years (https://en.wikipedia.org/wiki/Galactic_year https://en.wikipedia.org/wiki/Galactic_year) which means even if we start today to spread around would still take half a billion years to populate the galaxy. Now if only genetics would deal away with aging to be around when that happens :).