Still, it's strange to me that the GPL is considered OpenSource while the SSPL is not. When the GPL was first released, its requirement that all linked modules be GPL-licensed wasn't so different from what the SSPL enforces today at the network level. I see the SSPL as analogous to the GPL, and the AGPL as analogous to the LGPL, essentially relaxing the requirements either on linking (in the case of the LGPL versus GPL) or on network interactions (in the case of the AGPL versus SSPL)