There is a key difference going from "convergence" to "conformity": circular reasoning.
People who need to sell the thing they invent, tell themselves that "convergence" is the best way there. Customers like familiar traits. So they design for intentional convergence, and that is the essence of conformity.
99.99999% of keyboards are the same physical layout. This layout is a standard that conforms to the general shape of an 1800s typewriter. There is no functional need to continue this. There was no natural convergence toward this shape: it's so bad it often injures the user! The only driver is the value of familiarity to the act of selling a keyboard.
With the advent of cheap 3D printers, we have seen a surge in hobby keyboard design. These people care so much about getting a better keyboard shape that they are willing to spend hundreds or thousands of dollars to get there. What they want they cannot buy; this was especially the case 5-10 years ago. The very existence of this group proves that traditional keyboards are the result of conformity, not convergence.