[hgsgm]

That's someone who doesn't know what words mean.

When a building is built, the scaffolding isn't an immutable part of the final product.

[tomjakubowski]

Well if we're being anal about the metaphor, in construction and renovation, the scaffolding eventually goes away. Scaffolded code rarely disappears entirely; some of it usually sticks around.

[beachy]

To be perhaps even more anal, after construction scaffolding is taken down, stored, transported to a new project and then used again.

[oefnak]

And it's made of steel, not bits.

[gorlilla]

If there are no bits then what're all the pieces linked to?

[paulddraper]

Then that makes it an inappropriate word for both uses.