Investments turn to relics in investor portfolios for two primary reasons: sentimentality and inertia.

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Yet after two years in power, Mr Fox's government has earned a reputation for caution that borders on inertia.

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But it faces two big challenges - the dominant position of JustGiving as the recognised brand for online fundraising, and the inertia of the charity sector.

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If Windows has benefited all these years from ecosystem inertia, and Microsoft has only really had to compete with the previous version of Windows for more than two decades, why is there suddenly some sort of existential threat to the continued dominance of Windows?

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