Time limit on upgrades
The problem with Dell blocking non-certified drives is that they cease to make drive kits available long before people typically want them - in EMEA at least. Typically a kit for any given piece of kit will cease to be available 3-6 months after the platform itself EOL.s. So you could buy a system close to EOL Dell won't be in a position to sell you an extra drive for in a year's time. I work for a company that makes its living out of supplying tier one retail drive upgrades to Dell customers. Dell use exactly the same suppliers - Fujitsu, Seagate for example - that we do and often the only difference between the two is firmware. Dell's move threatens not only our business but will alienate customers previously on their side.