I've always been a bit sad that more Forth-inspired DSLs never became a thing. Assembler Forths and C Forths often feel like DSLs on top of their host languages/environments, so doing the same thing as a network or build-system DSL would be interesting. I do recommend folks play around with more mature, big Forths like gForth to see what building an application up in a Forth like system actually feels like.