@b93ff72c When puritanism get in the way of symbolism… 

 @f997373b @a604497f It's a very good question.
I would say, *especially* if it's the best one.
Here, there are good concurrent, but f they where none, the more the tool would be used, the more the project (the language) would be biased toward «be used with the tool». Which would be problematic for a Free tool that a programming language should be.

Furthermore, enslaving the exercice of your art to a commercial licence is not very safe. 

 @a604497f It's a bad idea to use proprietary tools to build open source stuff. History is clear about it.