[galaxyLogic]

Mature tech evolves more slowly. Think about cars, there's nothing new about them any more. But wait, what about electic cars? Aren't they a new thing? And driverless cars. And soon flying taxis. Automobiles are an old invention but they are still evolving.

[aleph_minus_one]

The reason the evolution of cars has slowed down so much is mostly regulatory compliance.

With the current ongoing revolution in home manufacturing (starting with 3D printing; currently there is a lot of work done in home CNC machining), it would be easily possible to get a huge leap towards "print your own car".

The reason why you see nothing of this is basically red tape.