Some of the most revered guitar players, like Steve Vai, Joe Satriani or John Petrucci regularly play scales during their concerts. Of course, they don't keep t

Some of the most revered guitar players, like Steve Vai, Joe Satriani or John Petrucci regularly play scales during their concerts. Of course, they don't keep to one scale while playing -- they're masters of their craft, so they play a different scale every other measure. See e.g. https://youtu.be/Z01s5siJl6E https://youtu.be/Z01s5siJl6E -- the first two licks are clear examples of walking the scale, in one or both directions respectively -- or https://youtu.be/lGnEy9COP88 https://youtu.be/lGnEy9COP88