Agree to all of the above.
The slippery slope is : how will you ever enjoy the sports marathons when you know they are an inferior... how to call it... 'venue'?
It will still be , say, Mo Farah today, running alone far ahead from the 2nd probably, finishing at 2'08'' or something. You will be watching the exact same thing with Kipchoge, a guy running alone trying to bet his best, but knowing his best can never come close to the 'lab' one,
Imagine the same thing spreading. A perfect conditions 9:3x 100m. Who will sit to watch 10'' races again after that. Competition is great and all, but the real adrenaline spike is when you check the clock to see if they WRed. Where are we going if this is taken away from us?
Not saying it is happening, but yes , worried that this might have been the start of it.
Also all those thoughts don't subtract even the slightest percentage of my owe and admiration of Kipchoge's accomplishment, which goes far beyond a timed running section.