Magento is a hairy, messy monster, when all you really need is a nimble puppy
Strange analogy, but bear with me. Magento is big. Like, really big. It has a million and one features, most of which you’ll never use, but all of which will slow the damn thing down. There is so much code in Magento, so many features, menus, and options that you simply don’t need. Moreover, Magento is ugly. Like, really ugly.