Breathless futurism is not especially new - it's always been the content of WIRED magazine and of VC presentations. What I think is new, or at least characteristic of post-2010s, is the shallow omnipresence of the grift ecosystem.
That's R. U. Sirius, nom de plume for Ken Goffman. Before Mondo 2k, he published High Frontiers, too.
I wonder where they went. Are they busy crying about being scammed by the child prodigy/most popular effective altruist in the world, or do they not care because they had a finger in the pie?
Or perhaps they moved on to shill AI and its glorious wonders?
True, the manifesto was in 1909