> Think of it as a DSL

I can't let this stand as a blanket defense of crappy languages. We have Lua. We have Python. We have Scheme. We have multiple other languages that can be used as a good way to access the goodies provided by your wonderful hand-crafted libraries regardless of what they do. There is no reason for you to invent your own language just so people will be able to use your library code from a REPL.

Sadly, back in the dark ages, this was not true. However, in the future, anyone who tries to defend the horrible design of a new language with "Think of it as a DSL" gets to debug a 1000 KLOC application written in ANS COBOL 1968, which is a DSL for fixed-field database munging.