Here's my 2 cents. Look at that walker evans tube buggy that was using IFS. They end up switching to solid axles. They were using 3inch dia chrommoly shafts.
I dont think this is a fair comparison. First Walker Evans is an ass.
Sorry got sidetracked...
FIRST that rig worked very well as a trail rider. I dont think anybody on this board is trying to be a professional rockcrawler, or an ass.
(seriosly he is an ass, thats another story)
Second, If you think IFS is a waste of time you havent been wheeling with one built right.
Third SAS is harder to do safe and legal for street
IFS has many advantages over a straight axle.
*Axles are easy to swap.
*Their is room for upgrades if someone would mass produce some to sell.
*More front diff clearance
*Tie rods are tucked away
*You can build a ramp/bellypan from your front bumper to the mid point of your rig to slids across
*and of coarse jumping
Mike