Me.. sitting in a CI/CD transition meeting with one of the teams my team supports.. half awake as they discuss all this effort to bring parity to staging (because they don't do parallel stacks in staging but we do in prod for them)

"Here me out... OR YOU COULD JUST DO IT IN PROD!"
"What?! Do it in prod? But... testing?!"
"Do it in prod! After all last deployment that we just rolled back before this meeting tested perfectly in staging but because of factors we literally could not replicate anywhere but PROD.. it failed. So... you should just do it LIVE but you know.. with feature flags, incremental roll out and parallel stacks so we can fail back to known good builds... which we already do.. in PROD!"
My boss in a private message: "Are you upset at me for scheduling this meeting at 8am?"
Me: "Only slightly... but I am 100% serious about killing their Staging instead of having them waste a bunch of time trying to replicate what they have already built in Prod.."

TL;DR

DO IT LIVE, DO IT IN PROD (Assuming you trust your Devs.. if not.. well.. shit)