There was a time that Ubuntu was more polished than other distros but these times are gone. Canonical tried to capitalize their success by making their users “the product” at first and now have attempted to release a closed ecosystem of snaps based on proprietary backend software. They have signed their own death sentence more than once. Their way to redemption is to release the source code of the snap store under GPL and stop trying to replace GPLed tools with MIT or Apache licenses. Either you are committed to free software or not.

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.