[burfog]

We sure do.

In the old recipe, we replace the margarine with butter. We always replace the passenger pigeon, typically with chicken, but there may be higher-quality substitutes.

If you want to paint in the style of Rembrandt, you can do that without deadly toxic vermilion.

Music by Mozart and Berlioz is not normally played on the serpent or ophicleide. We're even beginning the process of replacing the contrabassoon with the contraforte.

So likewise, if you want to replace a heavy roof that supports fire and insects and fungus, you would use materials without those problems. The steel replacement beam may be of the original dimensions if it is hollow, but that only makes sense for something externally visible. Unseen internal structure need not replicate the original.