I think it is fair to say that the expectation is these mitigation clauses are effectively negligible, and about as valuable as the 90% clause, which it also commonplace, but doesn’t make the headline number
Generally speaking, golden parachutes payout at about 80% of the top line number. The only real exceptions are when somebody is fired not for under performance, but because the dream candidate became available (and when that does happen, it’s usually a amicable separation with a nice settlement helping pave the way to the next job).