Yep, I dig my Polytune II tuner.
Strum all of the strings at once.
Even with it if I bring the low E to pitch, another string that was in tune may get off slightly, but easy to fix.
What I like about using it to strum all at once is I can tune it so much faster.
Now this is with the SEs and the Gibson SG, as the 408 hardly ever goes out of tune.
Hats off to a bone dry neck that takes 30 days to build just the neck alone.
With the above device you would be having to move it around a lot from peg to peg and back again.