Going fast doesn't allow for secondary concerns and produces a single simple solution. That doesn't sound like going fast, so much as "the simplest thing that

Going fast doesn't allow for secondary concerns and produces a single simple solution. That doesn't sound like going fast, so much as "the simplest thing that could possibly work." Once you have that running, you can see where the shortcomings are and start to fix those. That will often proceed faster than trying to envision the whole complex thing up-front. (And that often results in a complete, but illusory vision, which ignores something which only becomes apparent once it's realized.)