Personally, and I stress personally...
This sounds like absolute nonsense. Detachable disc drive? For what reason exactly? Are Sony going to ship a tool kit in the box too. More importantly, when has Sony ever released a modular device that affects hardware beyond adjustable feet of a tv stand?
Again, it sounds nonsensical.
Multiple reason
- First I'll note the rumor is that the optional disc drive would just slot into the new PS5 design and make it look like it fits the overall aesthetic of the new model. Tools very well may not be needed. Even if tools are needed, the PS5 already gives users the option of adding extra internal storage and all that's needed is a screwdriver. No one's complaining about that, no one would complain about a screwdriver being needed for the disc drive, if one is.
*EDIT*
Also, the rumor is that the optional disc drive connects to an extra USB C port on the back of the new revision, so the chances of tools being needed a VERY low
*/EDIT*
- Sony wants to push users towards the digital ecosystem where they make a larger percentage of the profits and don't have to share with retailers on physical copies. If every single PS5 that's sold is a digital as the baseline, that will naturally drive up digital sales
- It allows Sony to simplify their manufacturing and distribution line and bring it from 2 separate models down to 1, which saves them money in the long run. The optional disc drive can also be sold at a premium, earning them overall more revenue while keeping the baseline console at a more attractive price
- If there is a Pro model coming then the optional disc drive could easily be designed to work on it as well. That would bring Sony's manufacturing and distribution line back up to 2 units, which is a helluva lot better than a potential 3 units if they kept the existing 2 models + a Pro. Basically by reducing the existing models down to 1 and introducing the disc drive, they're clearing space to make way for the rumored Pro model.
- Disc drives are a more common failure point in a console. That means when a unit is under warranty Sony has to spend a lot more for shipping/repairs of an entire PS5 unit rather than a scenario where they might just have to service a much smaller disc drive unit. This has the added benefit of less overall downtime for end users who still get to enjoy their PS5 while their disc drive is being serviced.
- Adding to the above, users who like to hold on to consoles for many years/decades would find that disc drives are a point of failure that can prevent them from playing their physical collection. Now they'll have the option of buying an extra disc drive or two to store away for decades to come so they can enjoy their games
- It's quite likely that the PS6 could be a digital machine with an optional disc drive, and this would help to further prime the market for that launch so people are used to it. They'd be taking it one step at a time with the PS5 launching with 2 models, then the PS5 revision/Pro having the optional drive, then the PS6 launching by default with the optional drive. It's a good way to ease the market into this direction instead of just dropping it out of the blue on a brand new console launch and potentially causing confusion when parents buy a PS6 + physical game for Xmas, and they don't realize they need the optional disc drive.