For experienced lisp users: how important have metalinguistic capabilities been for your work? How often do you create DSLs, interpreters, compilers, language extensions, syntactic features, etc.?For those of you who find it vital to the way you work/think, do you think the same level of power is possible with anything other than Lisp?Would you rather work with a system that embeds various computational approaches into an environment with metalinguistic capabilities, such as lisp? Or would you rather use a system that glues together various tools that are focused on whatever approach is needed for a specific piece?By computational approaches I guess I mean a lot of different things here. Functional, imperative, and relational programming. Binaries, web UIs, desktop GUIs, etc. I think the main difference would be having different pieces be first class citizens in the core environment.