Memory pressure sort-of means something sort-of doesn't. It's certainly possible that critical pressure could cause audio issues, but it could also be impossible to ever notice.

More importantly you shouldn't be experiencing audio stalls, so complain in the feedback app if you do.

That sound bug being there for so long would be pretty embarrassing for Apple if they haven't lost the ability to get embarrassed about the shitshow that OS X... i mean, macOS has become a long time ago..

Low memory handling is better that what Linux does, we can all at least agree on that :)