Originally Posted by MAST4R

It will all depend on your exact suspension setup and your exact preferences and uses but as a rule of thumb any decent suspension will allow you to forgo KDSS on road while being better on higher speed offroad sections (no punishing monster sway bar), have lower maintenance bills if you keep it like I hope I will (20+ years), and make mods easier to execute (fewer things in the way).

In my case, with 6112/Icon 2.0 rear the vehicle is very nice to drive on road as far as an SUV can be nice to drive on road LOL. I will upgrade to 650lb springs because the front is not stiff enough offroad but it is stiff enough on pavement.

I am not at all against KDSS. I love how it works in the GX package. But on a 4R I would rather simply upgrade the suspension. I don't really see the point of having KDSS and also upgrading the suspension though it is commonly done. BY contrast, there is a ton to like about the GX total package (KDSS+suspension) and the present-day GX is not really suited for difficult trails without significant upgrades anyway (like front bumper, to start with).