I really liked the whole event and my talk was also recorded. Thanks for everyone involved for organizing it. The day before FOSDEM 2019 there will be another CentOS Dojo in Brussels. I hope I have the chance to also attend it.
The most interesting thing during my two days in Geneva was, however, the visit of the Antimatter Factory:
Assuming I actually understood anything we were told about it, it is exactly that: an antimatter factory.