I do not share your view of old timey sales pitch, at least for the talk about systemd nspawn OCI container support.

If anything, that talk was a tad low effort, with even dismissive answers — "Yes" and "No?" as full answers to audience questions, with no follow up?! Still very informative though!

The Varlink talk really was very salesy for a Fosdem presentation. Shouldn't be long until the recording becomes available, feel free to tell me I was wrong after watching it.