Cross posted with hubner, but I'll leave it here anyway.
Plenty of people with old SON polished hubs, I have two, 21 and 18 years old and I expect a few have older, I also have a polished Rohloff which is also 18 years old, all used year round, no visible corrosion on any of them. I don't think the oxidizing is a problem and with a little effort you can polish them up like new. Nothing wrong with anodizing, I don't think it's ever as shiny as polished and when if dulls with age, there's no way to bring it back. Given the choice I'd always choose polished.