Lemonboy, You raise an interesting point. When working as a studio player in my past, I played 100s (maybe 1,000s) of rhythm tracks with high string / Nashville tuning guitars—usually two of them panned hard left and right. That was the thing. My guitar case had an index card taped in the inside with the preferred gauges for the strings. (I am mainly a keyboard person but used to be a decent acoustic rhythm person.)
Then the trend moved a little more towards heavily EQ'd standard six strings.
Now, there are a lot of tracks with four-string guitars or ukuleles, and some people are going back to the Nashville tuning. I think a std six string one side and a Nashville tuning on the other work well, but just as often I use a std six string in open position and second one in a higher neck position.
The point is always the same: get the guitar to drive the rhythm and chord structure without getting lost in the piano, electrics, and other things that compete for the same range. Acoustic rhythm is the backbone of my sound so it is much more critical to me than to others. There is a lot of country music out there with no acoustics--but I didn't cut it!