I have a KS and 2 Reverbs, tbh they’ve all been good. The KS is pretty old now, it needed a fair amount of rebuilding after a couple of years, but that was nonstop use, year round in scotland so hard times. The repair was £75 so not too onerous. It’s had new cables but that’s simple stuff (it used to be that the KS OEM cable was absolutely awful, I think they’ve stopped doing that)
The Reverbs are more niggly I find, the bigger deal is that when they stop working there’s nothing you can do- no manual adjustment, no easy repairs. My KS, there’s a wee lever so I can manually operate it even with no cable, which was good when I crashed and broke the lever in France. And if you snap a cable, every bike shop in the world can fix it. They’re still reliable, but I don’t like depending on them as much. And parts and servicing are pisstakingly expensive, if you break the (suspiciously delicate and exposed) lever it costs a fortune to replace, dick move Rockshox…
OTOH, I bought the Reverbs because they were cheap in the first place.
I really rate my GD but there’s no replacement for displacement, I’ve got 150mm drop posts on 2 bikes so even 125mm is noticably less, 100mm I just don’t like any more.