Dryers...
Early clothes dryers needed every bit of "broil" heat to bake all that water left by wringer washers out of laundry. *LOL*. It must have been very hard on those appliances having to cope with all that water. Then piled on top of that issue was high heat needed for doing so.... Even early automatic washers didn't provide very good final extraction so little relief came there anyway.
On matter of semi-automatic/wringer washers...
Read a report about the Canadian laundry appliance market post WWII. Wringer and semi-automatic washers survived as major part of laundry appliance market far longer up north than in USA. By 1960's and 1970's Canadian households were still buying wringers or other semi-automatics in decent numbers. This explains why you still see such machines (often in good to excellent condition) popping up for sale in Canada. It might go a long way to also explaining the odd few spin driers from Europe you see up north for sale as well.
FWIU by reading report many Canadian households (ok, housewives or whoever actually was charged with doing the wash) found modern automatic washing machines an anathema.
All that marketing about how wash water was pumped out after being used once, then one, two or more fresh water rinses was catnip to American housewives. But a good number of her Canadian sisters saw it as extremely wasteful.
This had much to do with fact that well into 1980's much of Canada was heavily rural. Women living in mining camps, on farms, and other out of the way areas often had same issues regarding indoor plumbing as we've all long heard.
To have a fully automatic washer you need a steady source of plumbed hot and cold water. Someone who has to fetch water by bucket full, then maybe heat it to get hot or boiling water wasn't about to just dump that wash water after being used just the once. Nor was she going to get rid of rinse water after just one load of use.
Such women wrote to the papers about it!
The other end of things had more to do with trade.
Wringer washers had long been state of the art. And Canada worked hard to get domestic production of all sorts of appliances done within its borders to avoid trade imbalances and providing other benefits. Large companies like GE, Whirlpool and others started separate divisions, licensed things or otherwise moved production up to Canada. Then you had Beatty, McClary, English Electric and other local concerns...
Bottom line was those factories long had been tooled for turning out wringer washers. As such they could make them all day long rather cheaply, and same for spares.
Automatic washing machines were something different entirely. Places would have to retool, and if didn't have access to local home grown patents, again same thing as before would have to occur; things would have to be sourced from USA.
John Inglis and Company was purchased by Whirlpool and is now "Whirlpool Canada". As the former Inglis was one of first in Canada to produce fully automatic washing machines.
It's worth noting that when Maytag stopped production of their famous wringer washer back in 1983, they laid in 25 years worth of spare parts before wrapping things up. This explains why you can still find so much NOS Maytag wringer washer parts lying about spare. Much to the happiness of many who own such machines.
What killed wringer and really semi-automatic washer sector in USA was rising tide of affluence.
Post WWII there was a huge push to build new housing that had all mod cons. Other things like push to bring utilities to rural or at least not urban areas meant homes had not only indoor plumbing, but the utilities needed for washing machines, dryers, dishwashers, etc...
By 1950's Whirlpool, General Electirc and other appliance makers were fully engaged in PR and marketing campaigns to get housewives out of what they considered the middle ages.
It didn't help that Consumer Reports and similar groups were damning wringer washers to Hades post WWII. They didn't see the point of them any longer now that fully automatic washing machines could replace what they considered a dangerous appliance.