I put the post below together for anyone wondering what UNIX alternatives existed with what superior attributes: https://news.ycombinator.com/item?id=10957020

I put the post below together for anyone wondering what UNIX alternatives existed with what superior attributes: https://news.ycombinator.com/item?id=10957020 https://news.ycombinator.com/item?id=10957020 "Successful" was mostly social and economic factors rather than technical. The most successful in mass market are the OpenVMS variant called Windows, an OS building a GUI platform on a UNIX/Mach hybrid, UNIX OS's such as Linux, and an OS building a user-space platform on Linux. UNIX's and BSD-licensed code allowed companies to save money & increase adoption building on existing code/ecosystem that had tons of momentum. Mainframe OS's are still going pulling in huge revenues, including MCP via Unisys (Burroughs renamed post-merger). IBM i's succeeded AS/400 that succeeded modern System/38. Microkernels and mainframe VM's got reinvented as modern clouds with VM's or containers. Legacy continues even if original products mostly died out.