Still flying dude.
S 400 envelope starts from @50 miles from Ukraine. They arent very mobile and subject to counterbattery, so cant get close. Coverage vs maneuvering targets is under 100 miles.
AMRAAM vs cruise missiles should be just fine to cover all the strategic bits of Ukraine without risking SAMs. Heck, even if one reserves the F16’s for deep coverage that lets you concentrate the SAMs further up front.
The Uke Air Force is suppressed. The are utterly ineffectual, rare, and uncoordinated at this point.