Plus, you ALREADY own your code, by nature of it being DRM-free.

You also own it from a copyright perspective. Any code you write yourself is your own, and GitHub is only given a license to use it when you choose to upload it there (and if you use GH Copilot I guess). You are free to copy and distribute your own code however you want with no regard to anybody else's wishes. You may even choose to charge money for access to your code if you want.

The two are completely incomparable. Still, it's a well-deserved jab at Sony, though somewhat of a pot-and-kettle situation when accounting for MS as a whole.