I just made a long post about it in the French-speaking solarpunk community, and I don't really have the courage to translate everything, but DeepL should do a good job. Here is a summary and a photo-dump, don't hesitate to ask me things about it.
For context, this was organized by the ADEME, an entity of the French government that is tasked with managing the "ecological transition" and as part of this they promote explorations and experimentations in the field of "intermediate vehicles". Things that are not bikes, not cars and try to reinvent mobility. It was very hackish (I myself came with friends from a fablab/hackerspace who are building an electric kart) and with a huge variety in opinions and technical choices.
We talked technology, philosophy, open source, low-techs, economy, sociology, legalities. It was brain-buzzling!
These are great! And very much what I could picture thriving in a world where cars don't entirely own the roads