Well You need hdd/ssd to install a game but console comes with it built in.MVG is talking about another form of DRM protection where you cannot play offline but im talking bout the definition of a DRM
"digital rights management (DRM), protection of copyrighted works by various means to control or prevent digital copies from being shared over computer networks or telecommunications networks."
So basically all videogames nowdays have it from digital to even disc form since the data on the disc has to be installed to the hard drive or SSD and the disc basically act as the DRM key so it all DRM we cannot escape it
The fact that you do not need to authorize your console and to patch the game or system is main point.
You can most likely buy ps4/ps5 (lol maybe) and buy days gone and play. Fully 1.0 offline with never connecting online. Fully apocalypse scenario.
The moment game requires any patch to play or online authorization - it's gone.
That's why no patch will ever fix gt7. They would need to reprint the discs and make a new version even if they ever patched it to work offline