There are damn few ideas that'll hold any water. But being light as a feather has its advantages. Economies and markets are like anchors. Conceptual art never had any real economy, and look how it took off. Network art has the same up-side.
Nobody gives a shit, but it is spreading like wildfire.
It makes you think twice before you make something heavy to carry and difficult to store. It's like drawing versus painting. If you ask people what's more important, they'll pick painting because colour is hard, painting techniques are more difficult to master, mistakes are permanent, etc. But let's face it, craft time is overrated, and material persistence and permanence are outdated concepts. We learn to appreciate things over time as our experience builds or accrues in layers.