Just hours away from Boston Marathon: What would Eliud Kipchoge's Marathon Career been like if he had started in 2007?

I think he would regret not taking silver in 2008 behind Bekele

Good question, I think he might have medaled, but I don't think he'd have beaten Wanjiru.

I wonder how much of an impact skipping the years of shorter distances would have had on his discipline and mentality.

If it were me, coming into the marathon with years of high level performances and then running consistently well at the marathon would set my confidence on a consistent upward trend. If he had started out on the marathon, maybe he wouldn't have had quite the same discipline to maintain the (I'm assuming) higher mileage than he ran while on the track. Fewer wins could lead to losing trust in the process rather than doubling down on consistency, and from there maybe we never see the same 2013-2023 Kipchoge.

Then again, I can't run a single 14:17 5k and I have no idea what it takes to do what he's done.