FWIW, I'm building a simple 32-bit computer system based on Prof. Wirth's Oberon RISC CPU and a simple language called Joy that combines the best parts of Forth

FWIW, I'm building a simple 32-bit computer system based on Prof. Wirth's Oberon RISC CPU and a simple language called Joy that combines the best parts of Forth and Lisp. The primary motivation is to avoid unnecessary complexity. But there's also a Permacomputing angle. Permaculture is a school of thought about what might be called the art and science of applied ecology. From that POV the main concerns of ecology in re: computers would be efficiency and reducing environmental load of making chips, etc. The other common theme seems to be a kind of post-apocalypse computing (e.g. Collapse OS). I don't really know where I'm going with this... Simpler computers would presumable be more efficient and easier to make? - - - - Really, the crucial thing from my personal POV is the reduction of complexity. I'm pretty sure that that's the primary measure of the durability of our large global interconnected economies: "Make it as simple as possible, but no simpler." :)