What do you think of this, Bicicleur:
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It seems to me that this hypothesis, that Modern Humans and Neandertals stem from a non-African ancestor (a non-African population of H. heidelbergensis, for example), has much to recommend it.
Eurasia has twice the size of Africa and has been home to hominins for ~1.8 million years. It was inhabited by diverse hominins, and thanks to blind luck we discovered that as late as a few tens of thousands years ago, it also sported two of the populations that split off before anyone else: first H. floresiensis, and second Denisovans.
While a North African source of modern humans is plausible, the data seems to favor a Eurasian origin of the (Modern Human, Neandertal) ancestor."
I would still go for an African origin of modern humans.
After all haplo A is typical African.
For haplo BT, I'm not so sure, haplo B and E might be backmigrations.
The nubyan complex originated in NE Africa, but during the Eemian (after the before last glacial maximum), it appeared in Arabia and stayed ther for some 70.000 years.
The appearance of the nubyan complex in Arabia predates the split of BT, which might be the branch that brought the nubyan complex in Arabia
We know now that early modern humans lived among many other tribes that went extinct in their Y and mtDNA.
The Irhoud samples are some 300 ka, and the 2 ka San were a mixture of haplo A with a 260 ka population.
I doubt the Omo Kibish 195 ka remains are modern humans.
https://en.wikipedia.org/wiki/Omo_remains
They seem more related to Irhoud and Skhul/Qafzeh. They all have the protruding unibrow.
To me it looks like the modern human branch with Nubyan complex came to replace these people in NE Africa some 160 ka.
The second split in the Y-DNA pedigree was the split of A0-T, which happened 161.3 ka.
https://www.yfull.com/tree/A0-T/
I wouldn't be surprised if these were the first people with Nubyan complex tools.
Apart from A00, all older Y branches of modern humans went extinct.