It infuriates me to no end that we are expected to put up with building design and technology from 1900 as a consequence of the obsession with "property values must go up" (notwithstanding the property) and a healthy helping of "regulations are only ever added to, everything old is forever grandfathered".
Like, central ventilation is not magical unobtainable technology. Simple heat recovery even vastly improves heating costs in a way insulation never can.
A large-scale overhaul of the entire country's housing stock is not realistic for multiple reasons, including shortages of qualified people.
There is a lot of old buildings out there.
What’s the alternative? Governments pass regulations and all buildings must be adapted within 12 months? 36 months?
What of the buildings that don’t comply in time? Or can’t find trades to do it in time? Or we notice to our eternal shock that projects to ensure code tracking are priced at a serious premium?
Or, how many improvements to code would we decide weren’t desirable because of the costs of retrofitting, so now we lose even the low slope of improvement versus today.