"In a real free market, everything tends toward commodity pricing."
No.
This assumes people only buy products based on price and would choose cheaper alternatives.
Doesn't look like this to me, e.g. I'm a consultant, I base my pricing on value not cost (what is my cost anyway?) and people pay on value. Other consultants are not undercutting my prices, for various reasons, e.g. because reducing prices would diminish value perception. I'm not a commodity and never will be (perhaps if AI makes great leaps forward).
Same happens with Apple devices which are far from cost based pricing. Assuming others have the same product - I don't want to get into quality, brand recognition etc. just pretend - if they base their products on cost and undercut Apple, they would move out of the luxury/premium segment. One could argue Apple pricing is high because of an 'Apple monopoly on Apple devices', but the same works for any premium segment (Nike and Adidas premium shoes for example).
Beside the premium argument there are other examples where "In a real free market, not everything tends towards commodity pricing" - in particular only commodities do.
(Interesting side note: Read about value maps, evolution of products towards commodities and strategies from Simon Wardley)