Regarding the last point << Yugabyte was tested by Kyle Kingsbury back in 2019, which uncovered some deficiencies. Not sure what the state is today. The YB team also runs their own Jepsen tests now as part of CI, which is a good sign. >>

Please see this blog https://www.yugabyte.com/blog/chaos-testing-yugabytedb/ for latest updates, as well as information on additional in-house built frameworks for resiliency and consistency testing.