Also, having the domain doesn't make it available on Maven Central. You need to apply to have your domain become a registered groupID on it. This is a manual review process. They validate your domain through TXT verification to make sure the requester to create the group is the domain owner. Then they look to make sure the library is packaged to it. And finally there's a check that the groupID isn't too similar to any existing ones in name, especially to popular ones.
This generally takes 3 to 7 days to get approved.
Once you have a groupID you can release many libraries under it, you don't have to go through that process again.
Now from the user side, things are simpler too, because every lib has a groupID ownership and the lib name. Similar to how on GitHub you have owner/repo.
So it's much easier for me as a user not to confuse org.apache/Log4J with org.malware/Log4J
And like I said, even if someone owned the domain apoche.org they most likely wouldn't get approved to register org.apoche on Maven, because the name is too similar.
It still isn't fool proof admittedly. But it seems much harder to manipulate. And especially if you're a careful user, much easier to trust the source. As long as you got the groupID correct, it's signed and validated. And you can be sure that what you found on apache.org is going to be org.apache on Maven.
Finally, even if the domain changes hands, it doesn't matter. You won't be given access to the Maven repo. Access is given to the Maven user account who registered the group. All you need is to own the domain when you create your groupID. Now if someone transfers their Maven user/pass to a malicious users or become malicious themselves you're still at risk.
Also, I believe there is an appeal, again manually reviewed, like in case you believe your account was stolen, where if you can prove that you own the source repo and/or domain and all they might reinstate you.
But also artifacts are signed, so if your account gets stolen, the thief would need to steal your signature too so it can publish malicious artifacts to the Maven repo.
