Yes, the difference here is that Astro considers Starlight to be a core part of our project. We use it for our own docs, as well as it being the basis for a significant percentage of our users' sites. I've no reason to believe Docusaurus's funding is in any danger, but I think the Open Collective that pays for full time Starlight development is probably a more dependable source of funding than Meta.
Yes, the difference here is that Astro considers Starlight to be a core part of our project. We use it for our own docs, as well as it being the basis for a significant percentage of our users' sites. I've no reason to believe Docusaurus's funding is in any danger, but I think the Open Collective that pays for full time Starlight development is probably a more dependable source of funding than Meta.