I don't have an issue with adjustable stocks, but it is kinda funny reading the reasons.
I don't loan guns.
This is southern Arizona, it's ALWAYS t-shirt weather.
I am too fat and and old to worry about looking like an "operator" - when I was young an operator answered the phone when you dialed "zero".
Nobody else shoots my rifles.
I haven't been able to find a match to shoot in for 6 years, so I don't really care about multiple shooting positions.
My armor, (yes, I have a set), has the "shooters cut", from
http://www.ar500armor.com/ ,(they have armor packages starting at $175), and I don't notice any real difference for LOP with my SA vz-58,(that has a folding stock for storage), and yes, I have fired my rifle while wearing the plate carrier with plates in it, just to see what it was like. I also wear it about twice a year. Maybe. Nice stuff to have.
Having said all that I DID have an adjustable stock on a shotgun, the CZ 712 Utility with the ALS stock on it. The idea was to try to get my son into shotguns...didn't work. Same thing - I picked a length and kept it there.
Now when I get the proper Mother-May-I official Fed approval to SBR my Scorpion I might get an AR style adjustable stock, for the look, and because it will fit easily on the adapter I already have.
I can see everyone's point, and it's true, you guys do have a lot of good reasons to own adjustable stocks, just none compelling enough for me to go out and get one.
BTW, I have shot in the cab of a truck, but it was an armored truck and it was out a gun port. Rifle was a Mini-14 and no, it wasn't a robbery attempt - testing the setup years and years ago. That was when i became seriously interested in bullpup rifles.