I think the modern car climate is a better comparison than the change from horse and buggy to Model T. Many people work on their own cars, but it's mostly for fun and the increasing levels of computers and sensors in cars makes it more difficult to do all the work yourself. And then you add in the nuts and bolts car companies make that can only be unscrewed using special tools that the companies also make to force you to bring the car to one of their dealerships.

Tech literacy rates are falling like the skill to use a car with a manual transmission. Since everything kids do is on their phone, and phones are like that one car company that welded the hoods of their cars shut, they never need to pick up the skills with computer software that the work world expects them to have (but who really wants to know how to use Word and Excel anyways), nor the skills with working on your own hardware.

Sidenote: Fax machines are, unfortunately, still very much a thing. At least, if you ever have to deal with the federal government or the medical industry, they are.