> And IIRC during covid, didn't the IETF do online only meetings?

Yes, we did! The IETF pivoted in March 2020 to fully virtual with 701 remote attendees. That continued for 2 years until March 2022 when we started having in-person again – and since that time they have been hybrid (and will continue to be so). The IETF also invested quite a lot in online meeting tools & supporting systems to try to make the remote experience as good as possible.  

IETF 118

November 04-10, 2023, Prague, Czech Republic & Online

1067 onsite attendees

739 remote attendees

IETF 117

July 22-28, 2023, San Francisco, California & Online

890 onsite attendees

544 remote attendees

IETF 116

March 25-31, 2023, Yokohama, Japan & Online

993 onsite attendees

594 remote attendees

IETF 115

November 5-11, 2022, London, UK & Online

849 onsite attendees

667 remote attendees

IETF 114

July 23-29, 2022, Philadelphia, Pennsylvania & Online

618 onsite attendees

675 remote attendees

IETF 113

March 19-25, 2022, Vienna, Austria & Online

314 onsite attendees

976 remote attendees

IETF 112

November 08-12, 2021, Online

1177 remote attendees

IETF 111

July 26-30, 2021, Online

1206 remote attendees

IETF 110

March 8-12, 2021, Online

1177 remote attendees

IETF 109

November 16-20, 2020, Online

1061 remote attendees

IETF 108

July 27-31, 2020, Online

1102 remote attendees

IETF 107

March 23-27, 2020, Virtual

701 remote attendees

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