You mean about adding SSD to gnome, which will not happen?

As an argument in favour, I see:

• Support for more applications that “don’t want” to implement CSD (i.e. foot terminal, davinci resolve, that one archive manager I can’t remember)
• Lifting burden for applications that don’t need custom decoration buttons, and so don’t care about implementing their own decorations
• Making the decorations on those applications consistent with the theming of the system

As an argument against, I personally don’t see any. Sure, most gtk apps are designed for CSD and will not translate well to SSD, but I just don’t see why that should stop gnome from implementing SSD. I remember the gnome maintainers were strongly convinced against SSD, but I don’t remember their argument