As Rich himself wrote, none of these ideas or implementation strategies were novel or original in clj. What appeals to me (as well) is how tastefully it was put

As Rich himself wrote, none of these ideas or implementation strategies were novel or original in clj. What appeals to me (as well) is how tastefully it was put together. A bit like the typical clj project that composes smallish libraries. The strength of the ecosystem is in how well those snap together, which comes back to the tasteful bit - great synergy and universal use of the core language features.