The latter days if VH there was a concert when they did Jump which the synth part was a wav file. It was up a half step. It took Eddie a bit of time to adjust but Roth was nailing in that key.
Supposedly Sir Duke was recorded in Bb and sped up to B. Trumpets, trombones, and the sax family are all based on flats and would not be that easy.
There are some music hard asses that say keys are for amateurs but seeing bands live they don't always do the key that your hear in a studio.