The impressive thing isn't merely that it produces thousands of lines of code, it's that I've reviewed the code, it's pretty good, it works, and I'm getting use out of the resulting project.
> What would you say is your multiplier, in terms of throughly reviewing code vs writing it from scratch?
I'd say about 10x. More than that (and closer to 100x) if I'm only giving the code a cursory glance (sometimes I just look at the git diff, it looks pretty damned reasonable to me, and I commit it without diving that deep into the review. But I sometimes do something similar when reviewing coworkers' code!)