I made an alt on Oceania and it is a ghost town on all servers besides 2 hours of Australian peak times. And brought my main to dynamis for a few months for a house upgrade and realized i would have to datacenter travel back to primal for pvp and aether for raiding. I end up bringing my main back to primal and got lucky and got another small house with how dead even dynamis felt since everyone goes off to other datacenters for everything. I think the Oceania populations also already had established friend groups they had for years on NA/JP datacenters and weren't as willing to give up friends for better ping.