I'm a native speaker and I hate how people have been stumbling through their presentations, lacking basic vocabulary, being dragged along by their bullet points. It wasn't even the accent, it was that the language occupied their minds so much that they couldn't think about what they had to say or how they were saying it. Lots of talks felt like watching a ninth grader in front of the classroom.

Now some of these guys weren't amazing presenters in German either, but my point is that they should not have to be. Some people simply are dry explainers and they don't naturally entertain. Nothing wrong with that at all, especially with such nerdy topics. But in those cases, I'd much prefer a lengthy blog article, or maybe a podcast interview with a capable host. Please, CCC, don't send these people on a stage that they don't enjoy when you could also work with them to get their stuff across.

And with how much is consumed as VOD, I don't think the live talk brings a lot to the table anymore. There could be live Q&A sessions for those who read article or heard the podcast interview.

(I'd argue the same for an academic context by the way - anything above seminar size is either a celebration or a sermon, but not a discussion.)

My best experience at CCC was to literally stumble over bunnie on the side of a hallway where he was sitting against the wall, introducing his own ARM laptop to a dozen of people or two.

And don't tell me this doesn't scale - he has also gotten his message across in ways that scale. But there was finally a natural way of asking questions in a back and forth manner that wasn't in front of a 500 people audience.