I recently ran across a classic post from Avi that I haven't read in quite a while. I'd forgotten how much I agree with this stance. What makes Smalltalk and Squeak in particular so great and a joy to work in, is that it's Smalltalk all the way down. I don't have to context switch to a different language when I want to get into the guts of something. I don't run into weird issues trying to translate one language into another.