Well, I agree totally. I love old houses but you just cannot compare the two in terms of efficiency.
I'm a builder and I did remodels on old houses for years, decades, actually, and a lot of really high end ones, but now I mainly build new spec houses on the mid to high price range for my area. We do smallish foot print square footage (approx 2000), one level for age in place (lots of retirees flock here), heat pump furnace and water heaters, or ductless mini splits, materials that are long lasting and require little maintenance (cedar siding, quartz counters, LVP flooring), super insulation above the code minimum, air exchange systems, the last one even had a 6.5 kw solar array!
Sorry this sounds like a pitch!