If you're making your own language, it helps to write real programs in it (for some value of 'real'). There's so much detail to flesh out of what seem like good

If you're making your own language, it helps to write real programs in it (for some value of 'real'). There's so much detail to flesh out of what seem like good ideas in the abstract. For a niche-enough language you might contribute in this way even if you didn't start it.