Twin tub washers with "spin drier" extraction had been around since 1930's if not bit before. Besides Easy there was General Electric, Hotpoint, and perhaps a few others.
Thing was IIRC everyone seemed to source their twin tub washers from same place: Easy.
https://www.automaticwasher.org/cgi-bin/TD/TD-VIEWTHREAD.cgi?92018
Consumer groups gave these twin tub/spin drier washers warm praise, much of that from fact they lacked the dreaded wringer (mangle). Housewives OTOH weren't exactly won over.
First and foremost these twin tub washers were large, and not always shaped for convenient storage out of way when wash day was over. With a wringer washer one moves things to sink/source of water, sets up series of tubs, etc.. But when wash day is over all that is put away. Those twin tub washers were another matter.
Then came fact then as today any sort of extractor, spin drier or whatever you want to call them tend to vibrate and or move about when operated. Offerings by Easy, GE and rest were no different. This tended to unnerve some users and consumer groups. Easy sold little rubber disks one could place under wheels of washer to make it more stable during spinning, how well they worked I cannot say.
Twin tub washers with spin dryer/extractor cost more than wringer washers. That counted in many households where money may have been tight. Not every household (ok, His Nibbs who often was in charge of how money was spent) didn't see benefit of spindrier machines over wringer washers versus cost.
Video clip from 1939 showing a woman using twin tub washer/spin drier. It was filmed at a housing complex in Greenbelt, Maryland. Notice how laundry room has also Maytag wringer washers.
You can see compared to the Maytag WW the spindrier machine is quite large.