Hi John, At 07:02 PM 16-11-2017, Meetecho IETF support wrote:
It hasn't. Meetecho "Observer" mode still has audio + video + slides + jabber + etherpad. The only thing that is missing is the possibility to raise your hand to make comments through the virtual queue.
The change where registration is required for Observer mode occurred as from IETF99. Prior to that, registration was optional.
Regards,S. Moonesamy