I thoroughly enjoyed this, despite arriving in Brussels on a red-eye only 2 hours in advance. The organization of the event was flawless, and my Swift on Android talk went very smoothly.
It was great to meet face-to-face with many of the developers I've been working with over the years, and to see such an enthusiastic and diverse audience gathered there demonstrates that Swift's influence and mindshare is quickly expanding.
I think we should definitely have more events like this, either conference-adjacent or stand-alone.