Choice of Fuel

At some point in the past 14 years, there was an explosion of these energy bars that took place.  Before my 12 year haitus from competitive cycling, there was only Powerbar and Clif Bar, with no more than just a few flavors each.  I always hated Powerbars because of their texture but I consumed them nonetheless because they were quick sources of fuel.  Now, there's an entire side of a grocery aisle filled with bars of all varieties and nutritional content. I suspect it's only a matter of time before someone does a detailed timeline of when and how these all came into being.  Now that I'm back doing 2-hr rides, I know I need to consume these while on the bike so I figure I try a few different flavors.  Interestingly enough, Sprouts Market had every brand except for Powerbar.