Why do video game console discs now require installation, when we could just put them in and play instantly before? Why did PC discs always require installation

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Answer 1

The primary reason was it was faster to read data from the hard drive than the disc

This started with the ps4 and Xbox one

But Xbox 360 had the option to download games to the console hard drive and it was also faster.

Now ps5 and Xbox series s and x have very fast solid state drives. No disc media can compete with those speeds.