I like using clips and threaded shock bodies. thing is when the threads are filled with dirt and such and or wet it can be a pain to adjust them, and how many turns on the threaded collar will make for 2mm or 4mm of ride height of going up or down?
Plastic collars 1 or 2 shims, seems a little faster than saying hey pitman raise front 2mm or (4mm)(as he turns and measures with calipers and also cleans out the threads or forces the nut to turn and tears the o-ring).

or he can grab 2/ 2mm shims or 4/2mm shims or 2/4mm shims and pull down spring and add it.
I kinda wish the big bores were non threaded.