This is absolutely not true in areas where heating the air and water and cooking are done with natural gas. Every single appliance in a house is more efficient today than in 1970 due to advances in motor speed control, without exception. The only thing that didn’t get more efficient is electric resistive heat and it’s impossible to improve on that anyways.

I can’t think of a single appliance from 1970 that consumes less energy than its modern equivalent. Anything with a pump or fan is more efficient and so is lighting. LCD TVs use less energy than CRTs.

I also can’t think of an appliance that has become common in households that draws more than 100 watts of continuous load since the 1970 aside from just ‘computers’. An ancient 500W 80% efficiency PSU at max load only has 5.2A of current at 120V single-phase.

If you convert your natural gas furnace to a heat pump, you will use more electricity but excluding that and NG to electric HPWHs leaves only more efficient equipment.

Sure, but there are more appliances plugged in today than there were. The simplest evidence for this is that there are never enough outlets in an old (unrenovated) home.

In a renovated house, you won't have aluminum wire at all, so these concerns are null.

My original statement should be qualified. Since we were talking about aluminum wire it's relevant -- an updated house will have new (copper) circuits that can handle all this stuff. An NON updated house might have Al wire and be overloaded in a more severe way than it was in the 60s.

But FWIW, new >100W appliances:

  - microwaves (1200+W)
  - air fryers (1500W)
  - electric pressure cookers
  - rice cookers (mine claims 610W on the plate)
  - stand mixers (old: 80W, new: 475W)
  - desktop computers (esp gaming rigs)
  - resistive space heaters (1500W)
  - *bigger* TVs (compare 72" LCD to 19" CRT?)
  - air purifiers (mine clocks 175W on high)
  - towel warmers? :)
  - and the ubiquity of 10-20W small stuff has of course exploded, and it all adds up