[vram22]

>Probably it's not that easy to replace Lisp for something else at Google, since it implements a relatively complex search engine core. Thus it's still used.

Thanks, makes sense.

>At Viaweb Lisp was used for an early web store maker (enables people to have their own webshop) implementation.

Yes, I had read PG's article about it ("Beating the Averages"). IIRC the templating language they used in ViaWeb, which allowed customers to customize their stores, was a killer feature, and relied heavily on some Lisp language feature, maybe macros.