Quoting Zach Kehs
If you continue to add floors and rooms to a building forever, it will collapse. Software faces no such constraint. The code can always get worse. There can always be a new layer of indirection or a reduction in performance. — Zach Kehs , There's No Limit to How Bad Code Can Get Tags: technical-debt
We haven't written up this one. Simon Willison has the full story — the link below goes straight to it.