Ask a Soviet engineer to design a pair of shoes and he'll come up with something that looks like the boxes that the shoes came in; ask him to make something that will massacre Germans, and he turns into Thomas "Fscking" Edison.
Crappy old OSes have value in the basically negative sense that changing to new ones makes us wish we'd never been born.
It is exciting to discover electrons and figure out the equations that govern their movement; it is boring to use those principles to design electric can openers. From here on out, it's all can openers.
...your Web browser is Ronald Reagan.