This article echos a lot of the themes that I saw in "Family spaghetti of programming languages" (https://erkin.party/blog/190208/spaghetti/) which seems to be the best attempt at developing a family tree of programming languages I've seen thus far.
Ooh, I really like the idea of this, but I kinda wish he broke Fortran into a whole family, with separate entries for each major version. There was a lot of cross-influence between Algol and Fortran, and while the original Fortran inspired Algol, Algol ended up as a massive influence on how Fortran developed later.
