Problem is just that none of the arguments hold up.
1. The notion that nobody got their feeding right while the science was out there is extremely implausible. Especially when we do have evidence for teams absolutely chasing marginal gains like bubble wrap TT suits
Never suggested nobody got it right. That almost all riders are getting closer to perfection, discipline and race support would increase performance to a broader rider base.
2. Performances are going way past previously established limits of oxygen consumption. Therefore these improvements cannot only be due to higher availability of the correct substrate, but there must be higher oxygen consumption, which is mostly done using oxygen vector doping. Agreed, particularly in established riders that show sudden improvement.
3. Results of better carbohydrate uptake would be directly mimicked by higher fat oxidation at the same intensity but being at a lower % of overall VO2 max.
4. The pattern in changes of performance between easy unipuerto days, MTTs and very hard stages hasn't changed all that much. Nearly all riders will still do much bigger numbers on an easy stage rather than a very hard multi mountain stage, and I don't think the gap between these has changed all that much. Based on what? It appears that more riders are able to confidently hang in tougher climbs; until they can't.
5. Optimal feeding, especially if it's based on relatively old science, should if anything cause more riders to perform at their ceiling, and should thus increase the population of competitive riders at the top, not decrease it.
That's who I'm referencing-the general peloton. See response to 4 above. Key to this is race support in the form of quality pre-race meals, and timely delivery during an event. Bad teams wreck their chances and some have a reputation for weak support. With the exception of this year's Pogacar romps the number of riders involved in tight podium competition has become more of the norm with week long and 3 week races having serious parity into the last stages.
To me, the nutrition argument doesn't pass the sniff test in any way, and we're only talking about it cause so many pundits and riders who are clearly part of the Omerta are talking about it. Not in any way?