What is the essence of a novel operating system? Which concepts are essential, which can be improved, simplified, or discarded?

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• What is the essential foundation of a novel operating system, and can it be extracted like a chemical distillate?question0.831
• Concepts are the building blocks of software systems, objective features of a system’s design.claim0.766
  Asserts that concepts are not just mental but concrete design elements.
• A fast implementation of this primitive, possibly in hardware, could be the basis of efficient and compact implementations of a diverse range of programming language semantics and data structures.claim0.751
  Claim that hardware-supported associative lookup would enable high-performance dynamic language runtimes.
• Abstraction is the key of any modularization; without it, reliability and correctness guarantees vanish.claim0.739
  Fundamental design principle driving Oberon: proper abstraction enables modular structure and maintainability.
• Concepts are not just subjective mental constructs, but are objective features of a system's design: increments of functionality that were consciously introduced by a designer to serve particular purposes.concept0.738
  Central definition from the abstract.
• Viewing the system as a collection of applications is a valid and useful approach.claim0.731
  Foundational assumption for the pattern language.
• Small, well-designed core (storage, file, display, text, viewers, loader, drivers) enables powerful extensibility.finding0.730
• Object-oriented concepts are irrelevant to solving parallel programming challenges.claim0.727
  Strong assertion that the enthusiasm for 'concurrent object-oriented programming' is misplaced; objects do not inherently help with parallelism.