Doesn't seem especially out of the norm for a large conference. Call it 10,000 attendees which is large but not huge. Sure; not everyone attending puts in a session proposal. But others put multiple. And many submit but, if not accepted don't attend.

Can't quote exact numbers but when I was on the conference committee for a maybe high four figures attendance conference, we certainly had many thousands of submissions.

When academics are graded based on number of papers this is the result.

This is an interesting article along those lines...

https://www.theguardian.com/technology/2025/dec/06/ai-resear...