[klibertp]

> That would be enough. I believe more people should be thinking about programming languages - even if it's just for fun or learning.

Yes. Having a solid understanding of how languages work makes exploiting particular strengths of any one easier. It makes polyglot approach viable. It makes you less dependent on external tools and support from other people, as you can always roll your own linter, autocompleter or other such things. Being able to debug and modify your language is rather extreme, but very effective measure against some development problems.

It doesn't even need to be that great of a time investment to learn the basics. I see no reason for not doing this if you're a professional programmer. Language design and implementation is a thing that you'll interact with every day working as a programmer. It really makes no sense not to have at least basic grasp of it.