I'd like to hear about your experience with unmodified OE spindle strength. I've heard rumors of them being less than robust and Total Chaos fab puts out a kit to prevent bending/failure:

Spindle gusset kit with swaybar - $87 smackers:
Toyota 4Runner 2010-2022 SPINDLE GUSSETS - WITH SWAYBAR MOUNTS | TOTAL CHAOS FABRICATION

These gussets were designed to reinforce a known weak link on your Toyota. Unexpected harsh front impacts at high speed or while under braking can cause catastrophic damage to your factory spindle / knuckle. These weld-on gussets were ogiginally designed for the US military and their 8000 lb. body armored vehicles. Dont get stranded on the trail. Protect your OE parts.

But who here has had this failure, or seen it first hand?
Can you share the details/tire size/usage when failed?
Or have you been wheeling hard, rock strewn trails without much issue to report?

I don't have a big issue with this modification - I'm all about reinforcing areas of concern, but this mod seems to prevent the use of stock TRD OR wheels, and forces us to replace them with either spacers or aftermarket wheels, which we're not to keen on. (unless we have to)