TBF, pushing a site to the public while adding a “no scrapping” rule is a bit of a shitty practice; and pushing it and adding a “no scrapping, unless you are Google” is a giant shitty practice.
Rules for politely scrapping the site are fine. But then, there will be always people that disobey those, so you must also actively enforce those rules too. So I’m not sure robots.txt is really useful at all.
“Rotting” is a state that won’t last past the middle 30s. By 2056 they’ll be fully decomposed.