Here's a summary article
https://www.newswise.com/articles/view/816253/
People who are "good at computers" can do more, do it more quickly, and become less frustrated while doing it. People who struggle with memory or executive function issues can wind up unable to complete tasks like looking for work or getting driving directions.
The idea that people can just receive tech skills training and be able to manage the variety of continuously changing user interface is inaccurate and this deepens digital inequities.