In the 1960s at RAAF Pearce a Vulcan did a barrel roll during the climb out from Take-off, mag bloddy nificent it was.
When an aerobatic manoeuvre is defined as more than 90 of bank we are a nanny state for sure.
Done by people who knew what and when to do what was in the capability of the equipment, go for it, we may NEVER see it again more is the pity