Food, housing, transportation, and medical care may not get any cheaper. Food is already highly mechanized. Housing is saturated in the places where people want to live. In the US at least we lack the political will to make transformative investments in transportation, and gas production is already as mechanized as it is going to get. Medical care is likely to remain labor intensive using very expensive labor.
Sure, the average worker may be able to buy more things at Walmart than they can today, but that has less of an effect on quality of life.
Could not disagree more. Education -- especially the University variety -- is clearly at the top of a multi-decade cost cycle, and will become much cheaper as it becomes more digital.
Health care will absolutely be much cheaper in 30 years than it is now. We can provide 1960s-style health care to most people for literally hundreds of dollars / year. The fact that we choose not to because technology has improved quality faster than it has reduced costs is irrelevant. At some point that trend will reverse, and when it does costs will drop dramatically.
Construction costs are mostly driven by labor costs these days, and as construction is mechanized those will trend towards the cost of raw materials. Obviously there's a sort of theoretical floor there, but even the cost of extracting metal ores from the earth has dropped substantially as technology has improved.
All of these things trends are pointing in the same direction; they are just moving at different speeds.
Housing is politically saturated. There's plenty of room and technology to vastly increase the number of housing units and lower cost in desirable cities, but current zoning and planning regulations make them illegal to build.
Regardless of how semantically we phrase it, the bottomline that the parent made is valid... (Housing is saturated in the places where people want to live) i.e., it is as saturated as it can be, with no immediately conceivable resolution to the status quo.
If remote working was normal there would be potentially huge shifts in demand for housing. People don't necessarily want to live where they do but that's where jobs are.
Sure, the average worker may be able to buy more things at Walmart than they can today, but that has less of an effect on quality of life.