Just speculate, for fun. I like the posts from Coach JS, he rather favors these smaller sizes and could better structure it than me. It is well known that elite runners are reluctant to make their training different from the mainstream. So, a maximum of 100km per week with everything, probably on three or four days. The intermediate days are only casual cross training. In order for it to have something, it would have to increase the quality of the runs, but to optimize fewer sessions and the regeneration. Typical for Kipchoge, which he already does:
Track: 3km warm-up(14min) + 15x1k w/2' recovery + 10x400m w/1' recovery + 3km cool-down (15min) . Total: 33km.
Long run: 40km long progression run in 2h11min ( dirt road, undulating course) + 1km wu/cd. Total: 42km.
These two runs alone mean 75km. Presumably, it does not make sense to do a 42km run every seven days. It may be good to alternate for example a pretty fast 32km long run, i.e. the classic 20-miler (plus wu/cd) and a comparatively slower 42km run in the following week.
If he distributes the remaining 25km-32km to one day (10km easy in the morning, 15km fast in the afternoon) or 2 days (one day of it pure quality), I do not see why he could not run a good time.