Wringer washing machines remained popular up north (Canada) for several reasons primarily...
First was fact that Canadian manufactures already had production down of those machines. Everything needed could be sourced within the country for most part, production was simple (compared to automatics), production was already set up, etc.... Automatic washing machines either would have had to be imported from United States, or setting up of new plants and so forth in Canada. There had been a big push to get more manufacturing done within Canada as opposed to importing (NAFTA didn't exist yet), so there you are on that front.
Next there was a large demand still by many Canadian housewives who saw automatic washing machines (top or front loading) as wasteful with water and offensive.
This came from face many parts of Canada remained quite rural well after WWII, this and or places lacked the indoor plumbing required to handle automatic washing machines.
As such women (or anyone else) still did washing the old fashioned way, heating water on stoves etc.. Even if they did have plumbed hot and cold water the idea of using each change of water once was seen as wasteful.
Read that such women read adverts advertising how laundry was rinsed in three, four or more fresh changes of water (likely an early front loading washer), were indignant at such wastefulness. They wrote to the newspapers about it.....
These were housewives living on farms, mining camps, but women living in other areas had quibbles as well.
Think have gotten things correct, but here is link to paper one read on matter:
https://instruct.uwo.ca/geog/9322/Parr1997.pdf
It is interesting that late as 1968 51% of Canadian households with a washing machine had wringer type, while only 32% had fully automatic.
This explains why you find so many wringer washers (some often in near new condition) on offer in Canada. Production and buying went on far longer as primary washing machine compared to USA.