[goto11]

I would recommend just removing the cruft rather than throwing everything away. But cruft should really be removed continuously.

[dllthomas]

I was merely being descriptive, clarifying that there are not uncommon situations where requirements have changed and yet nonetheless one of your options is aptly termed a rewrite.

If I am to move into making recommendations, then I think the whole thing is ultimately situation dependant, but that your advice is correct for the most common cases.