A recent openssh upgrade removed ssh-rsa from the default list of HostkeyAlgorithms, due to security concerns. See https://levelup.gitconnected.com/demystifying-ssh-rsa-in-openssh-deprecation-notice-22feb1b52acd
This means the one-liner to access the SOS console currently fails:
Unable to negotiate with port 22: no matching host key type found. Their offer: ssh-rsa
I need to manually invoke ssh with the -oHostkeyAlgorithms=+ssh-rsa parameter.
sos.*.platformequinix.com should support more modern host keys, so this works by default again (and is more secure)