If you enter the thread you'll get it. It piles the new XSX version 24GB over the 21.1GB XBO version and you can't delete the XBO one. Check the later pages of that thread.
It can start pricey and drop drastically over the years due to being shared in a much wider PC market.
and again the SSD add on will drop for the xbox to, its like people are making out there won't be price drops. yes it maybe expensive at the moment but its available for those who want it