Delivering BBC Online Using Serverless

It's a shame one of the largest media companies in the world is publishing a blog post on how they scale their web content platform / assets on Medium, not on their own blog.

If anyone here is from the Beeb is WebCore a replacement for Cosmos or an alternative for some services? I was originally involved in Cosmos in the early days and while it had some warts it was probably ahead of the game for a little while. Almost everywhere I've worked since have attempted to build PaaS but most are hacked together scripts and nothing as coherant.