I find it fascinating modern humans are thought to have evolved 300k years ago, but we haven't got any idea what happened before last ice age. I find it hard to believe people would just "stay in Africa" prior to last ice age (120k years ago and before) when the moment climate allowed it (~10k years ago) they spread out all over the planet.
That narrative is changing. Scientists are starting to think the peopling of the americas happened a lot earlier than we previously to believed. https://www.science.org/doi/10.1126/science.abg7586
By the way, this is unrelated to the GP post which was about hominids walking out of Africa, more than 1M years before entering America.