Non comp guys dont do it, I've seen some pro mod rigs and such on trails that had em ( most memorable the TJ up at Tellico ) and it worked wonderfully.
I think for a trail rig and the types of wheel speeds we see on some steeper loose things it would be torture on parts... I personally dont see the need for non comp use. But Im horribly lazy too.
in a general trail rig unless you are hill climbing all the time I would say dont bother. it does make a difference when you get on the big up hill portions though. it does fatgue parts much faster as well.
Cool beans - I guess out here the only spots we have much trouble with are the big vertical ****. Anything that's like technical crawling is usually doable with very little throttle when it's dry (364 days a year)
Basically - some of the climbs out here just about require it, and on many others it at least helps - but not as much as stickies...