> - synchronous multi-master cluster (Galera, Group Replication)
Which doesn't work, see [1]. What other features of those you listed the authors claim that work, and just don't when you look deeper?
Lot of the big companies are using MySQL as a NoSQL database, and that's not a bad way to use MySQL, but it's a pretty bad relational database, see [2].
[1]: https://aphyr.com/posts/327-call-me-maybe-mariadb-galera-clu...