I'm an odd-ball, I honestly can't even find a reason to deviate from stock... and that's TRYING. Don't know if it's only knowing how to drive one way (grew up in Wyoming, learned to drive there from a man who sold insurance and saw lots of crashed vehicles, I don't "ride" the brakes, ever), but even towing a loaded 16' dual axle equipment trailer down a steep (but short) grade, I simply can't find a reason to change. And I *absolutely* don't have ABS kicking on, ever. Wait, I have to go way, WAY, out of my way to make it trigger... driving too fast on a dirt road and absolutely slamming on brakes. It's not like I live in a dry area, Georgia gets a lot of rain and wet roads, braking is never a problem under any conditions I've experience.
For DDing, I'd only ever consider the change if I had to replace the calipers (but I'm a mechanic, I've never replaced a caliper in my life).
If you drive like a reasonable human (not the type who only understands full throttle or full brake), there shouldn't be any reason to change the brakes from a Function standpoint. I suspect most people make the change simply because they want to spend money on some sort of "upgrade" just to say they've done it (or to feel something about themselves). The silent majority (those other 750 million 4-runners that aren't in this forum) have never heard of a TBU and wouldn't spend their money if they had heard of it.
Obviously, mine is only one opinion and it is Just an opinion. There's no right opinion, just yours. Obviously there are a number of people on here who like the change. Of course, walk through any parking lot anywhere and you'll see there are a number of people who think it's perfectly fine to drive around on bald-to-the-cords tires too.
