Yes. Some time between whipping up a little prototype and getting to 10k lines of code, you may want to reconsider the architecture and language of the solution

Yes. Some time between whipping up a little prototype and getting to 10k lines of code, you may want to reconsider the architecture and language of the solution. That is not a reason to start off thinking it will get that big, so you have to over engineer it, because the vast majority of scripts don't. You design to the most likely scenario.