Tutorial Doctor, kernels are designed to manage memory, paging, thread and process scheduling, file systems, networking, general low level device communication
That is what I figured Linux did myself, and the reason people use it for servers and stuff. But the process used to manage the memory could vary from Linux to something entirely new.
So building an OS off of a Linux kernel could work, (has worked) but if such a thing was intended when the process was created-- I don't know.
As I said, I can't form any valid opinion on Linux, but I was thinking that an OS that was designed to meet the criteria above from the start would be ideal. Can't say if it is realistic yet.
Now, I do hear the phrase "don't reinvent the wheel" a lot, but I think that there just might be more efficient alternatives even to old and established things. The lightbulb was a neat idea, but might there be some more efficient way of giving light? Sure, perhaps creating something relatively new, "Nothing new under the sun" would prove a lot of work, but that is how revolutions start.
Most information is built off of a base of knowledge. But just like a building, if the base or foundation had issues, so will the final building, no matter how long you build on the foundation.
Another example is how a geodesic design is more efficient than a rectilinear design (where the housing market concerned.) In the 1970s such innovation was impractical, but in this modern world of "energy efficiency" such a design was the future. And I do think that such a design should be used today, and some people would still be alive if it had been (the design is very resilient).
I do like to research old ideas to see why their applications failed, and see if there might be some new way to handle the old ideas with the advancements we have today.
The Egyptians had some cool stuff... haha.