“Graphs are really common data structures but there hasn’t yet been an "everything’s a graph" language.”
Contracts baked into the syntax, a graph-first language, a reactive calculator that behaves like a spreadsheet. Every one of these is useful, and none of them exists, because nobody gets funded to build a language that isn’t chasing a hype cycle. The industry has dozens of new languages. Most are the same C-family syntax with a different package manager.