I did end up going the way of writing that compiler and never writing the thing I wanted to write the compiler for, even forgot what it was. But it was and is

I did end up going the way of writing that compiler and never writing the thing I wanted to write the compiler for, even forgot what it was. But it was and is a good experience, the last 13 years of writing a compiler. Especially if you like solving problems with no or few searchable solutions.