Is the conventional wisdom surrounding optimal cadence for long gravel climbs - specifically, the emphasis on maintaining a high cadence (80-100 RPM) to conserve energy and minimize muscle fatigue - truly applicable to riders of varying fitness levels and technical abilities, or is this advice more suited to elite athletes and gran fondo enthusiasts, potentially leading to inefficient energy expenditure and suboptimal pacing for more mortal riders who struggle to maintain such cadences on steep, technical terrain?