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My 2 printers are hard wired to the router but my wife can still get to them through the WiFi in the router. I don't use WiFi much myself. I actually have 2 separate routers with different network access. I have one for guests that only connects to the internet. My network is on another router.

I find that explanation difficult to believe. Drum elevators were converted to three-phase AC or built with AC motors as early as the 1910s in Europe, typically using slipring motors with resistive starters before WWII and direct-start squirrel-cage motors from the 1950s onwards. Only big systems for high-rise buildings used complicated Ward-Leonard motor generator setups well into the 1970s or even 80s until solid state speed control for large AC motors became feasible. If an older elevator overshot the highest floor, an emergency switch operated by the car roof killed power to the controls and the spring-loaded brake was applied automatically. Furthermore, the worm gear drives used for both drum and traction elevators are self-locking, it is almost impossible to power them from the output shaft. Last year I had the dubious pleasure of manually lowering the counterweight of such a system after it had been detached from the car and even though the full weight pulled on the gearbox, winding the weight was hard work.

Vienna abolished public DC supplies in 1965 and that was comparably late by European standards. Many other cities entirely converted to AC as early as the end of WWI. At a time when only some 10% of households had access to electricity that was a somewhat easier task than later.

Being able to supply twice as much power at the same amount of current certainly seems a step in the right direction considering large parts of the worlds commonly have general purpose circuits with 10, 13 or 16 A at 230/240 V throughout their homes. Higher voltages also have the major advantage of reducing voltage drop.