Yeah DTAN and any other domain reliant on DNS is vulnerable to gov overreach.
Lots of onion service relays listed here:
nostr:naddr1qqxnzde3xserjdfjxvurjvp4qgst94nsmefmya53crp5qq39kewrtgndqcynhnzp7j8lcu0qjple6jsrqsqqqa28tdea8t
Discussion
And nostr clients exposed as Onion services:
nostr:naddr1qqxnzde3xsensvphxsursd34qgst94nsmefmya53crp5qq39kewrtgndqcynhnzp7j8lcu0qjple6jsrqsqqqa28rs63vp
DTAN needs to release their code so you can build locally if you wanted to above cloudflare