Great question! It's not ideal, but has been outweighed so far by the other benefits I mentioned. I do track the issues I run into due to lack of static types[1] in the Manual_tests files in each of my projects, e.g. https://github.com/akkartik/lines.love/blob/e568378ecb/Manua...

[1] I wouldn't say Lua/Python/Javascript has no types. They just lack types for variables rather than values. Forth, on the other hand, has no types period.