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whether this more affects the sites that "have not moved with the time" and remained unchanged for years
if the only thing that propped the site before was old IBL using old style link buildings
how an old site would fire if it was completely redeveloped and maybe the old URLs with old IBLs just let go 404
I am wondering has anybody tried this and what were the results
Google was telling us years before Penguin that they were on top of all that crap.
The concept of freely given links being the best type of IBL has been around since Adam was a boy.... it's not new and in most cases an old site will actually have more of these simply because it has been around that much longer to accumulate them.