Optical storage is much cheaper than physical storage at the moment. If I wanted to back up my entire steam library, it would be less expensive to do it with a mix of Blu-rays and DVDs. Blu-rays are also good from 10-50 years, with archival grade good for up to 100 years.

Now, yes, I can just burn the installers to the disc, so that’s fine, but I’m talking specifically about them released big box games, where I don’t necessarily want the game, but I do want the launcher/installer experience as it was when it was first released.