Good architecture is pretty much just about slicing things up so that rewrites / refactors can happen incrementally, rather than all at once. This can actually

Good architecture is pretty much just about slicing things up so that rewrites / refactors can happen incrementally, rather than all at once. This can actually go both bottom-up (these functions are easy to re-arrange and don't need a rewrite) and top-down (these functions suck, but I don't have to rearrange anything to replace them). "Good architecture is the one that allows you to change."