“To allow comparing open source and proprietary solutions, we’ll make it compulsory to calculate the TCO over 4 years, including for maintenance, licences, migration and productivity.”
Chuckle. 4 years! They are being very generous. The longer the life-cycle, the more expensive that other OS becomes because of the increased lockin/exit costs. Whichever way you slice it capital costs of IT drop about 50% when using FLOSS and maintenance is even a larger drop, nearly 100% if you consider the cost of re-re-reboots and malware. A bloated monopoly just cannot compete on price/performance without huge cuts in prices.