These pieces provided by Dojo — or any other comprehensive toolkit, for that matter — are but starter patterns, and thread, and scissors, and pins, and a sewing machine, and OK I’m stretching the metaphor, now, but my point is they’re definitely not finished one-size-fits-nobody garments. On the other hand, if I decide to use jQuery in a large application, it can feel like I’ve been given a black marker and some of that crinkly brown paper, and now it’s up to me to draw a pattern and then come up with all those other pieces, too. Intellectually interesting and pleasingly crafty, perhaps, but not particularly efficient, sustainable, repeatable, or maintainable.