I saw three engines didn't fire at liftoff. Shortly after, a fourth engine flamed out. Then some moments later a fifth engine flamed out. The SpaceX/NASA feed showed status of the booster engines during flight and the graphic showed the non-firing engines and locations as they failed.
I was also surprised that the Starship and booster held together during the multiple flips and gyrations of the combined vehicle. Very sturdy craft!
I’d be interested in seeing what kind of telemetry they were able to glean off this...
Just amazing what they were able to accomplish. Iterative design isn’t for everyone... but Elon and his crew are showing its efficacy for certain.