Did I miss something? What "pure" EHG or WHG for that matter spread into Europe and Asia? It didn't happen. The "Indo-Europeans" all had either Caucasus or Med or both. Their herding, their metallurgy, it all came from the Near East. You're too smart not to know that, Bicicleur.
I do think the domestication of the horse (unless done initially by herders from the Caucasus), the "marriage" of cart and oxen and then horse is down to them, and perhaps a particularly war like nature, much like that of the other warlike, pastoral, herding people, the Semitic tribes. Both spread a lot of yDna around. To each their own, but the glamorization of warrior culture is not something I find congenial, to be personal for a moment.
Fwiw, my comment was rather tongue in cheek, as my emoji should have indicated. It was also a question. I'm not sure I totally buy into this idea.
As for the length of time from "farming" to the plow, that's only one indication of progress. What about the painstaking work of cultivar and animal breeding. These things take time. Also, one invention builds upon another. As time passes, the speed increases. Look at the speed in innovation from the Industrial Age to today. You're also way too smart not to know that.
it was I-DNA and mtDNA U which reemerged in Europe, I didn't say replace
same for EHG, I said spread, not replaced, you added the word 'pure'
Yamna has no EEF, nor Natufian, the only SW Asian component is CHG, I estimate some 15 %
in Europe there was a clear resurgence of the WHG component after the first wave of farmers
the data is scarce, but it looks that that allready happened in megalithic Europe (Iberia and France) and later also in TRB
and out of the Pontic steppe and the northern European forests spread people with an EHG component
both WHG and EHG were lacking completly in meso- and neolithical SW Asia acording to the data we have so far
on the level of Y-DNA it is even a step further, because in the expansion out of the Pontic steppe and the northern European forests it looks like practically no SW Asian clades were part of it
my point is that if those EHG hadn't developped any genes for farming they were quick to adapt and they were creative to domesticate horses which proved more beneficial on the steppe than cattle or any other domesticates
as I pointed out in another thread I suspect that R1b-V88 and R2 were present in the Zagros mountains when through selective hunting techniques the domestication of goats developped 12-13 ka
maybe the R1a/R1b tribes - not R1b-V88 nor R2 - did the same in the Pontic steppe with horses
it may tell something about skills of the R-tribe related to hunting and understanding animal behaviour,
although I admit, I'm speculating quite a lot now
for the plough and draught animals, the first evidence we have is in TRB, I think it is very likely that it was invented in Vinca culture, which I suspect to be EEF, but no data availble on that either. I wouldn't be surprised if there was a good deal of WHG admixture, as in Vinca there was also fishing and hunting, which LBK people didn't do. LBK people relied completely on farming and domesticates. It may be the reason why they busted. Vinca had a much more diversified economy.
before the invention of the wheel there were oxens pulling sledges
the oxens where there before the wheel and the cart
I still think Cucuteni-Tripolye might be a good candidate for this invention