Consider what languages you love most or find most useful. Someone thought each of those was a good idea. I hear it is some of the most frustrating fun work you can do, but I've decided to enjoy their frustration rather than make my own. I have built a lot of DSLs in OOPLs.,

I'm doing it because it's a rare opportunity to exercise parts of my skill set that I don't get paid to exercise. Plus it's a lot of fun and very rewarding.

We don’t think about compilers because people are still out here making our compilers better.

It’s actually a great way to learn a load of engineering skills, parsing , symbolic lookup, grammars, evaluation, code generation, etc. I’ve often reused the design patterns behind those in other software.

I've done it. You learn a lot.

Try it. You’ll see why people keep going back. You get to exercise a meta that you can’t anywhere else.

you have some because 30 years ago we were writing compilers in our work and spare time. you're welcome.

I think it's not so much about writing a compiler to provide a new compiler to the world. It's more a mixture of curiosity and getting deeper insights into how a language works and besides that I think it is fun.