[richardwhiuk]

Weather scrubs are common, and not relevant to the success of a program.

GSE (Ground Servicing Equipment) are fairly common and fairly benign.

Valves on the rocket? Much, much more rare, and usually indicate some form of issue.

[Diederich]

From what was said at the scrub conference, with additional context, it was scrubbed only because of more strict rules regarding it being a manned mission. Normally they would have just recycled a valve and moved ahead with the launch. Apparently the rick here is extremely minimal.

[adolph]

> Valves on the rocket? Much, much more rare, and usually indicate some form of issue.

And to be fair to the starcrossed Starliner, the valve "pressure regulation valve on the liquid oxygen tank of the Atlas 54 rocket‘s Centaur upper stage."

https://spaceflightnow.com/2024/05/07/starliner-launch-scrub...