Because of the lack of developer resources or anyone at the tor project giving a damn they have removed support for all tor v2 as of october 15th (a week ago). And this is extremely silly since >90% of HSDirs are tor v2 (https://www.encryptionin.space/tracking-hsdirs-and-the-versi...). But they don't have the resources to maintain the (slightly less secure) v2 stuff alongside v3, so they're just throwing the entire 15 years of all of tor's domains, linking, search indices, and writing in the trash and starting anew from very few users and little infrastructure.
And apparently no one cares that Tor has deleted itself. No news. No blog posts. Nothing but the well hidden post and upset comments from a year ago. I've talked to various people on their IRC and they say even if people continue to run tor v2 supporting clients The Tor Project will eventually push out their centralized consensus flag to ban them from the network.