What they talk about is Rosetta's macOS frameworks compiled for Intel being kept around (which macOS Intel apps use, like if you run some old <xxx>.app that's not available for Apple Silicon).
The low-level Rosetta as a translation layer (which is what containers use) will be kept, and they will even keep it for Intel games, as they say in the OP.
The low-level Rosetta as a translation layer (which is what containers use) will be kept, and they will even keep it for Intel games, as they say in the OP.