I never said that an SLA was bad, what I said was FORD's version of the SLA was bad. Take a look under a Taco and see ow to make an SLA that works on the road AND off-road.
Trust me, I know all the benefits to an SLA suspension, especially one that utilizes coilovers or coils rather than torsion bars. There is very little static camber change during the cycle of the suspension. Granted the ability to get wheel travel out of a stock SLA setup is rather difficult, it's quality of travel is better. I'd still rather have 22" TIB travel than 10" of SLA travel for the same price.
In reality though, 95% of people with a newer 4wd vehicle NEVER take it off-road with the exception of some grass or a jobsite. That is why the vehicle was designed the way it was.
I think you over-exaggerated my point about the TTB being a street suspension. It's not. But like the SLA, it came at a time when people were off-roading less with the solid axle vehicles they had and were driving on the road more. It has been transformed by race teams and shops into a highly functional, stout (it has MAJOR drawbacks however, bearing design and hub design being the largest), inexpensive suspension. But when it was designed, a better ride on the road was taken at the expense of off-road ability.
I never said you couldn't be a real off-roader either. You brought that up. All I said was that the design of the SLA LIMITS it's abilities off-road.
When someone comes along and makes a suspension worth buying that aids in it's abilities rather than not help them at all, I will be interested to see how well it works.
I guess my point of all this is that they don't make 4x4s the way they used to. They don't have off-road ability in mind anymore in the design room. They are making them for the droves of people that want people to think they take them off-road.