Disruptive innovation is not a “breakthrough innovation”, that makes existing products a lot better. It transforms a product, that historically was so expensive or complicated, that only a few people with a lot of money or a lot of skill had access to it. Disruptive innovation makes it more affordable and more accessible that a much larger part of the population have access to it.
The first manifestation of digital technology was a mainframe computer, that cost several million dollars to buy and it took years for someone to be trained to operate these things.
That meant that only the largest corporations and the largest universities could have one. So the problem was taken to the centre, where the experts solved the problem. But then there’s a sequence of innovation, from the mainframe to the mini to the desktop to the laptop and then to the smart phone, that has democratised technology to the point that everybody has access to it.