Usenet or Fidonet would be a more apt comparison

Performance is the major flaw with microkernels that have prevented the half-dozen or more serious attempts at this to succeed.

Incurring context switching for low-level operations is just too slow.

An alternative might be a safe/provable language for kernel and drivers where the compiler can guarantee properties of kernel modules instead of requiring hardware guarantees, and it ends up in one address space/protection boundary. But then the compiler (and its output) becomes a trusted component.

yeah, communities should have subject tag sets. I don’t care for anime or sports or video games - i should be able to turn off those tags. Not block 50 different game communities ad hoc

Surge suppressors do not drop extra voltage to ground. They selectively short out surges between whatever two conductors have a high potential between them.

No ground conductor means there cannot be a high potential between it and anything else!