Is the entire cycling community delusional about the effectiveness of VO2 max intervals for improving efficiency on the road, or is it just the outdated training methods being touted by so-called coaches and experts that are holding us back, and if so, what are the actual interval protocols and techniques being used by elite cyclists to optimize their performance, because it seems like the typical 4-6x8 minute intervals at 90-100% effort with 5-10 minutes of active recovery is not only not providing any noticeable gains in efficiency, but actually seems to be leading to stagnation and burnout for many riders?