I think for most applications (especially the common use-case of migrating a scripting web monolith to a go service), people just aren't hitting performance issues with GC. Discord being a notable exception.

If these issues were more common, there would be more configuration available.

[EDIT] to downvoters: I'm not saying it's not an issue worth addressing (and it may have already been since they were on 1.9), I was just answering the question of "why this might happen"