I would absolutely love to see a velodrome-style 'elimination' running race where the last placed runner is eliminated every lap of the track. 25 participants starting with the winner running 10k total - would be awesome but brutal.
I won the Dartmoor vale marathon a couple of years ago (v small race with about 150 runners)
What was very surreal was being led by the guide vehicle, a large 4x4 driving 20m ahead of me at all times. I was completely alone for most of the race (won by 20 minutes in the end) apart from this truck.
Agree condition differences between the two make comparisons difficult but my takeaway was that beetroot could have added at most a few seconds and most probably nothing at all.
Beetroot seems to have the attention of sports scientists and a few pro athletes. i wasn't convinced and wanted my own data. If you don't think this provides any relevant evidence then fine. Not sure it warrants the abuse above though tbh.