WWDC makes me sad. It was such a great in person conference, I remember having a really weird issue with cookie handoff in Safari, and being able to sit down with a bunch of the Safari engineers to troubleshoot the issue. It started with one, then more and more engineers came to give ideas!
I appreciate making it available to everyone but it feels like there needs to be some kind of middle ground. IOS development just isn't as much fun absent the in-person community.
FWIW: My colleague went to Google IO in person this year, he said the entire vibe was just off this year describing it as "almost somber" to quote him.