You are assuming that someone upgrading brakes (caliper, rotor, pad and, in some cases brake booster), isn't going to change the wheel size accordingly? That's ridiculous. No, they will move to a bigger wheel. Stopping distance is also simple physics. You are turning kinetic energy into heat as quickly as possible, within the stability triangle. It is simple and people do this effectively everyday.
Most people who simply put on bigger tyres does not swap the brakes out for bigger and more powerful ones. Secondly, it also lifts the centre of gravity and when adding a lift, you even change the geometry. I'm sorry, but if you have a problem with the notion that having the contact patch further from the centre of the wheel increases the power needed to stop, I don't know what to say, other than you're purposely trying to troll. You say it is "simple physics". I agree, it is. It amazes me you can't see that yourself.
Again, effective high speed suspension is much easier to create with solid axle.
Independent suspension is a mature technology. I guess for solid axle rednecks loathe to look at physics will have an easier time dealing with solid axles.
Accounting for the unsprung weight in the spring/shock is very easy and is done everyday.
No it's not. Not when we're talking solid axles. Using stronger/higher spring rate coils/shocks doesn't actually "account" for it, as the unsprung weight is because the two frigging wheels are connected!
How do you solve the problems of unsprung weight of a solid axle setup and how do you solve the problem of them being connected? You separate them: Inde-frigging-pendent suspension.
IFS is so seriously limited in wheel travel
I'm done trying to educate rock crawlers who thinks that because it works at walking pace it must work at any speed.
that that you won't see speeds where unsprung weight and connected wheels will be a limitation.
Another ignorant statement. It works even on small ruts, craks, and woops. It works because they are not connected and has less unsprung weight.
But I know you won't recognise this, as you seem to think you can somehow setup a solid axle rig with the right shock/spring rate to compensate for the unsprung weight and the fact the wheels are connected. At that point, you have shown yourself to be wilfully ignorant of physics and therefore reality.
Because the differential does not move with the axle, the tulip joints in the CV axle have to account for the extension of the suspension. The position of that joint is out of line and at its weakest when the suspension is extended. This limits the available travel of IFS,
I am not talking about "extreme" travel. Obviously, in a rock crawling rig, you may need that extra travel. But having less unsprung weight and not having the two connected resulting in better grip at above rock crawling speeds have nothing to do with which system can better rock crawl. When I mentioend off road grip I specifically exclude rock crawling and I specifically said "at any speed above rock crawling speed". More travel doesn't help at in this situation.
without seriously modifying the suspension geometry with longer, trussed control arms. That's not nonsense... that's reality.
Nope. Still purposely trying to equate rock crawling travel with "better grip at any speed above rock crawling pace" is ignorant at best.