everyone running erigon nodes (like myself) are running full archival nodes, currently there are ~300, https://www.ethernodes.org/.
Many geth nodes are archival, but we cant see which ones are.
Many geth nodes are archival, but we cant see which ones are.
Technically you can tell which Geth nodes are archive nodes with a GetNodeData query over devp2p, although that call is deprecated and will eventually be removed. Its replacement, GetTrieNodes, cannot be used for this.
So, many people run full archive nodes now. Thanks erigon team!