Sounds so trivial, doesn't it? There's a reason I referred to the tail wagging the dog.

You're familiar with wordpress.com, and it's an instructive example. The open-source WordPress you can download from wordpress.org is meant to power only one blog, with posting by one or a few people. It can't possibly power wordpress.com, with its millions of blogs; yet wordpress.com really is WordPress the open source software. What bridges the gap between them is a theme, too, one that, like Proscenium, virtualizes WordPress into any arbitrarily large number of blogs ("nodes" in Proscenium terminology).

Ever heard of a MOOC? It's a "massively open online course", and recent examples from MIT and Stanford enrolled upwards of 140,000 students. I was asked this week if Proscenium could power something that size, and I could answer that it can, by bringing more cloud servers online. I designed it to scale.

Like I said, the HabitableZone doesn't use all of Proscenium's features.