very interesting thread..
part of the problem as I see it regarding tuning open or standard, or a combination of the two

is that some songs...IF they are to be played accurately require the specific
tuning they were written in..
Now, I know that sounds stoopit...but an example would be most of Page's work-and his
'secret' open tunings...HA HA
More specifically, (i am going to have trouble describing this, because I lack the training and vocabulary that goes with the training) on
slide songs that use 'fram' notes
(Kirk does this quite a bit) like a lead solo riff, cannot be dupicated in any other tuning.
So, my point is..
If I want to play Done Somebody Wrong exactly like Skydog, I will have to be tuned to open E or I won't be able to use the same finger style (fram notes) although I
can find the notes..(if I try hard enough) somewhere...ha ha.. but when it comes time for sustain, or a change..I won't be in the right position, etc. to pull it off.
I don't spend much time trying to duplicate songs, so much as learning how the sound was made that made the song enjoyable. That is where the frustration can be found for me, because sometimes the only way to duplicate the sound is to duplicate the tuning.
Sonny's song "Orphan's of the Motherland" is an example of Sonny's D tuning, that has to be followed to duplicate the riffs. The song can't be played in E or A44
very interesting thread