Most of the discourse around the Xbox Series X has been what it can do faster than the Xbox One. Its PCIe 4.0 NVMe SSD means that it’s capable of performing loading and transfer tasks quicker than console players are used to. For instance, the breakdown of file transfer times demonstrates nicely what kind of speed we’re dealing with.
Here’s an area where Xbox Series X hasn’t improved: When installing from a disc. According to GamesRadar+’s preview coverage of the new Xbox, its disc installation times are almost identical to last-gen. The example given is that Titanfall 2 took about 35 minutes to install.
Source: Destructoid Xbox Series X isn’t any quicker at installing games from discs