~Using my standard prosody instance, I don't see any avatar via the prose web app. I think that prose uses XEP-0292 (vcard4) to set and fetch users avatars, but this is not the usual practice of other clients (which rely on XEP-0084).~
EDIT: my bad, prose seems to use XEP-0084 but only for contacts in the roster. While being subscribed to the presence of a contact is a condition to receive 'live avatar updates', I believe it would be nice to attempt to fetch the non-contacts avatars too (if the XEP-0084 nodes are configured to be publicly fetchable).
Definitely! It's something that's known, we need to improve the way that vCard are handled in general and provide backwards compatibility for non-vCard 4 avatars in general.
~Using my standard prosody instance, I don't see any avatar via the prose web app. I think that prose uses XEP-0292 (vcard4) to set and fetch users avatars, but this is not the usual practice of other clients (which rely on XEP-0084).~
EDIT: my bad, prose seems to use XEP-0084 but only for contacts in the roster. While being subscribed to the presence of a contact is a condition to receive 'live avatar updates', I believe it would be nice to attempt to fetch the non-contacts avatars too (if the XEP-0084 nodes are configured to be publicly fetchable).
No avatar in groups either, but it's related to https://github.com/prose-im/prose-core-client/issues/50