I think it rather depends on what you want to do. I've read all the posts, and you all look a lot at rockcrawling. So you need strength, articulation, etc. A SAS for this application will work perfect.
However, there are different ways to wheel. See racing, desert routes, etc... I see that a daily driver with a SAS would be unconfortable and doesn't handle well. I see that desert cars with two solid axles are uncomfortable and don't handle well. Purpose built rallye raid cars are all 4wis for the much superior handlng. And they break, but as much as would be expected with any race car. Other rallye raid cars, such as Toyota HDJ 80 or Mercedes G never do really well, they are normally surpassed by IFS cars (Toyota HDJ 100, etc...)
So I think each person has it's own needs, so you might not need it. I know I don't.