here’s a new Interview with Marvin Wißfeld, the primary microG developer, done in October 2022.
It’s mostly also an introduction and overview to microG but by nature of having the developer speak contains more details. It’s a bit of an update to the 2020 interview posted in this forum - microG - What you need to know, A conversation with its developer : Marvin Wißfeld
Personally interesting to hear was the opinion of Marvin that the major obstacle to contribute to microG is the lack of documentation of Play Services.
https://www.youtube.com/watch?v=8sfnzd_mTOQ
The Interview is done by futo, a philanthropy project by Eron Wolf. They’ve given a grant to microG last year.