PS: SCMT: FWIW, I’ve coached hundreds of cyclists for over 30 years. Every athlete is different. Some need solids, some don’t. I can do hard 100+ milers on just drinks–no problem, especially with the modern stuff. If you’re fat-adapted and go at endurance pace, you can do hours and hours with just water (and maybe sodium). Everyone is different and “guidelines” (not rules) plus experimentation seems to do the trick. But you are correct that learning to eat on the bike can be useful for many. They just need to understand that gels have nanotechnology that they’re not telling us about and they should be especially careful if they’re the worst gel eaters in their region. I have the KOM, but I know others have issues!