TrivialBetaState

I am not sure how to answer that. Are you asking me to give you an example that the GNU coreutils were not used in a closed sourced s/w?

I think that people are negative towards rust utils, not because of rust or attachment to an old software but because they are not licensed under GPL or another copyleft license. Even if they become faster and more stable in the future, this is a flaw that will not be ignored.