I think this is great advice, but saying that PL design is done already isn't really true. Its not as hard to make a new kind of PL as you might think, but it is of course hard to make it useful.
Just combining the right features and forgoing the wrong ones into a language alone is an art, to say that its only innovation is a bit like claiming paintings are innovations because we have all the colors :)
Just combining the right features and forgoing the wrong ones into a language alone is an art, to say that its only innovation is a bit like claiming paintings are innovations because we have all the colors :)