PS5 Confirmed Backward Compatibility

[Pemalite]

Mr Puggsly said:

Can't find exact speeds but it does seem PS4 has a faster drive, so that would explain the faster install. Also, PS3 was slow as fuck for updates.

PS3 had a slow drive so some developers compensated with partial installs. But over time I do recall games being better optimized to run directly off the disc. Anyhoo, I'm arguing it was possible to run 8th gen games off a BD disc, I'm not arguing they should have.

Having seen SSD vs HDD loading videos, it seems to me open world games have a huge loading disparity. Most games may not be impacted as much. I certainly hope the move to SSD great reduces load times next gen. However, I wouldn't be surprised if developers use this as opportunity to spend less time optimizing.

The Xbox 360 had the bulk of it's library able to be run directly from disk... Likely that is due to the Core and Arcade consoles not coming with mechanical storage of some type necessitating it.
But the DVD Rom drive also had better transfer rates than the PS3's Blu-Ray. - Although that came at the cost of excessive noise. It sounded like a plane was taking off.

The Playstation 4's Blu-Ray drive can do 27MB/s sustained reads verses the Playstation 3's 9MB/s and the Xbox 360's 15.85MB/s.

In the Xbox 360's case though... Some games did necessitate an install to the Hard Drive... But the game would stream mesh and texture data from the optical disk in tandem increasing overall throughput as the Hitachi 5400rpm drive would tank to around 30-40MB/s when lots of random accesses performed... So it was worth doing in some cases.

It is entirely possible to run games off the BD-Rom drive with the right foresight though, no doubt about it. - The question though is whether they should when the internal 500GB drives are 60-90MB/s?