Acknowledgements
This special issue developed out of a workshop organized by Paolo Cuttitta and Antoine Pécoud at the University of Sorbonne Paris Nord in March 2021. It is part of the EU-funded LIBORG project (‘Horizon 2020’ grant from the European Union's research and innovation program – Marie Skłodowska-Curie grant agreement n. 846320). It was also supported by the French Agence nationale de la recherche (ANR) through the PACE project (ANR-18-CE41-0013). The guest editors would like to express their gratitude to all the workshop participants and session chairs.