Just one other thing; hand and finger size will determine how much you casn stretch. Much like being 4'11' and hoping to dunk a basketball, the size of your hand will also determine the stretches you can do.

I have fairly average sized hands but some stretches I see other guitarist doare just not possible for me.Even then, you find ways to adapt. Much of guitar playing is your ability to adapt what you can do physically to what you want to play.

The main riff for Foreigner's 'Dirty White Boy' is near impossible for me to do cleanly (until I learned the Mick Jones does it now with an alternate tuning!!! He looks to tune up a whole step). But to play it in standard tuning, I can't do it as well as I like and I've been playing it off and on since 1986...