Really sad to see E3 crumbling like this...Comparing attendance numbers does not make alot of sense IMO as this is more of a press show then anything else. But, in any case, Sony not coming back to E3 is a bit unfortunate.
E3 begun the switch from press to public years ago and this was
the exact reason Shawn Laden gave in 2019, which I'll repeat because Sony's message is consistent:
In quite a lengthy answer to the publication's question regarding E3, Layden explains the trade show used to be for trade; retailers and journalists would flock to Los Angeles to learn about new games on the horizon for their respective fields. Nowadays, Sony has its own February trade show called Destination PlayStation, informing retailers of the platform holder's plans for the year. As for games media, the internet has lessened the impact of reporting from E3. In other words: "the trade show became a trade show without a lot of trade activity. The world has changed, but E3 hasn't necessarily changed with it."
Another point Layden makes is that Sony simply doesn't want to falsely build expectations when it's focusing more and more on fewer, higher quality games. "And with our decision to do fewer games -- bigger games -- over longer periods of time, we got to a point where June of 2019 was not a time for us to have a new thing to say. And we feel like if we ring the bell and people show up here in force, people have expectation 'Oh, they're going to tell us something."
There used to be no public presence, then there was more and more. Last year there were 15,000 public access tickets to E3, this year there are 25,000. You do not need E3 to talk to the press, E3 is the
worst environment to engage with the press. But if you want to get the widest amount of gamers, skip E3 and head to
gamescon which in 2019 had 370,000 visitors.
Sony sure has the resources to be there @E3? They could be doing all their own shows anyway, plus the E3 then. Their last E3 was bad, but this year they have a new console. But maybe it is not that important to them as we see it. It is just a console/toy for gaming afterall.
Every conference you attend, with your devs, is another one-to-five days they are not working on their games and these things are in no way a holiday or even a welcome break. As I posted last year, when I worked in aerospace as an engineer, conferences were absolutely loathed by everybody apart from PR and marketing. They are a huge distraction from projects and are days of long hours, often in poor environments.
Conferences have their place for products or services that you can test, buy and talk over complex issues. They have little relevance to the games industry given how easy it is for consumers to keep up to date with developments.