[behnamoh]

One could also argue that DSLs are not always good esp. in large projects maintained by many devs.

[bmitc]

I think the counterargument is that in large projects, you will end up with DSLs whether you meant to or not. The philosophy of language oriented programming (LOP), as I take it or understand it, is that since you'll end up with them anyway, why not approach and build DSLs explicitly.

[konjin]

Another word for DSLs is functions (and objects).

DSLs are just better integrated into the base language so your source code doesn't look like:

    three = two.add(one)