I have seen some events doing very well and some doing very poorly. There are some factors not mentioned here. The biggest is cost. Travel, especially lodging,

I have seen some events doing very well and some doing very poorly. There are some factors not mentioned here. The biggest is cost. Travel, especially lodging, is very expensive right now in major cities, especially in the US. People just can’t afford hundreds per night. If an event has a larger population density within reach of walking, driving, and public transportation then more people turn up. Another is industry presence. Big companies have found that showing up at conferences and conventions isn’t really worth it. In the video game industry E3 died and nothing replaced it. Companies just post their own direct videos to make announcements. Apple even stopped gathering everyone in an auditorium and just does videos now as well. When the industry presence at an event, like maybe CES, diminishes, then that means there will be less attendees as well. Also, a lot of events don’t offer attendees anything they can’t experience at home. If it’s a bunch of talks, just watch video of them later. No need to be in-person unless you really need to do some networking. Some events are able to offer attendees a reason to be physically present, and they still draw a crowd.