Are side-entry mountain bike water bottle cages a solution to a problem that doesnt exist, or are they a game-changer for riders who need to stay hydrated on the fly? It seems like every new bike that comes out is specd with side-entry cages, but are they really that much better than traditional top-entry cages? I mean, how often are you really reaching for your water bottle while navigating technical terrain? And dont even get me started on the added complexity and potential for mud and debris to clog up the works. But at the same time, Ive heard some riders swear by them, saying theyre a total revelation for getting a drink on the go. So, whats the real story here? Are side-entry cages a must-have for serious mountain bikers, or are they just a bunch of marketing hype?