Do we? It seems like there are some people developing Unix clones for fun, and building their own RISC-V or 6502 CPUs. We don't have much innovation in OSes from amateurs, though. At least there's sel4, which is formally proven to follow a certain spec that makes some security guarantees.
the new layers of abstraction have not made programmers dumber, they have added more programmers to the stack.
we still have and will have people designing kernels and CPUs for fun.