Just as Android is a popular Linux kernel-based OS because it discarded the desktop Linux userland, Bluesky is, successfully it turns out, a case of being open,

Just as Android is a popular Linux kernel-based OS because it discarded the desktop Linux userland, Bluesky is, successfully it turns out, a case of being open, federated, and popular because they focused on product, not on existing standards that hadn't quite hit critical mass.