Idea Fight! Idea Fight!

How does one even count similarities and differences? What does it even mean to say there are more of one than the other?

Idk what definition of commodity you are using, but I will say that it seems that by wikipedia's definition something like food or manufactured goods are more of a commodity than land, something that can not be created.

I would agree that housing is a commodity though, so long as there is more land to build it on.

Wdym my tip system?

Hmmm, I guess I don't like the reasoning "extreme version of complicated idea is bad, therefore the idea is bad in general". Like its fine to dislike an idea's extremes, but it would be disingenuous to also dismiss its more moderate forms.

everyone is equal and thus should have equal rights and treatment under the law

Isn't that like the definition of (clasical) liberalism?

The mechanistic reasoning might be plausible, but is there any actual examples of a modern capitalist society regressing back to some form of feudalism to any significant degree?

The point where I'd be worried is when a single company is the majority of a country's GDP or has complete control over the government. The only examples I can think of that even get close to these possibilities are South Korea's Chaebols or Hong Kong's corporate voting block.

I don't think pure capitalism as you describe it exists, or if it does its definitely not common.