In my active adult community, the ages of residents range from 55-103. When surveyed last year, about 30% of this population do not own computers, tablets, or smart phones. Even though the Computer Club here started an "each one teach one" volunteer program where residents give in-home computer instruction to other residents, there are many ( including a lot of my neighbors) who really struggle with technology.
This community has its own weekly newspaper, which is very popular, because it lists all the upcoming special events, like concerts, travel tours around the world, bus trips to local shows and museums, art classes, and cultural lectures. The Board of Directors wanted to cancel the print version of the newspaper in order to save time, paper, and delivery costs. They wanted to publish an online version only, which required a user name and password to access. That discussion led to a huge push-back by residents who were worried that they did not have the tech skills, nor the computers to access the newspaper online.
When I was a young schoolteacher, the earliest microcomputers I remember receiving for my classroom were Apple in approximately the years 1982-1984. I was on a grant-writing team which had to apply for funds not only for the computer, but also for staff development funding to train the faculty. The graduating class of seniors was born in about 1964-66. That is the first of Generation X and the last of the boomers -- approximately. ( although there were some home computers available for retail sale in the 70's)
In general, for most baby boomers (defined as being born between 1946 and 1964), there was very little high school training available in micro computer technology in my area of southern California. The last of that generation, who graduated in the early 80's, had some rudimentary high school training. ( I'm speaking of training at the average public high school in southern California). This is my experience only. Disclaimer: YMMV. JMO.