I don't think that's true: I think the language / libraries did evolve, however the things they stopped (or never did) pay attention to; pr & marketing. Common Lisp[0] has a new site now so they are feeling the need, but it needs a lot more; modern videos with modern girls & guys making stuff with it and presenting it.

Ofcourse I long for some of the revolutionary stuff the Lisp community was known for once; particularly a better unified GUI library (I find GUI programming painful because of all the libraries which all do something else 'right'; no-one is doing real revolutionary stuff there) and a better concurrency library. With the knowledge within the community it 'feels' possible to make something for this modern age aka run the same code on AWS Lambda or on a Greenarrays ga144 without changing it.

[0] http://lisp-lang.org/