why? I have used sonatype and it's pretty much log in, promote to production.
On the positive side, some of the complexity comes through enforcing some standards about what packages go into central - in particular you must have a properly declared license, developer contact information, and GPG sign your releases. Which are things other language ecosystems would do well to enforce.
If by "standard" you meant "default", like Maven Central is the default in Maven, here I have some news for you as well. Bintray is the default in Mac OS' Homebrew, Android Studio, Groovy's @Grab, and first class citizen in Gradle, Ivy and SBT.