I really wish we had a front-end to software even half as useful as this in the 21st C, but technology has regressed massively since the ’80s and ’90s. Some of the old IDEs, before they became bloated “enterprise” software (because giant mega-corporations paid for them, not individual programmers, so the IDE makers serve their paymasters), started to slouch towards this kind of usefulness but fast and small. — LISP Machines