> Saying that 'maven central' implies maven isn't decentralized would be the same as saying "Most go projects are on github, so go can't be hosted in a decentralized way because github is 'golang central'".

It's not, though. Because github isn't the default. You have to explicitly specify that you want a project from github every time you use it.

The difference might be minor from a technological standpoint, but it means a lot in terms of how centralized things become culturally.