I was listening to a presentation recently and the presenter talked about some of the restrictions in working with 32 bit SQL Server on 64 bit Windows hosts. Another person joked that any companies still running 32 bit software were way behind the times. I heard a comment that surely everyone runs 64 bit hardware these days, don't they?

Do they? How many servers in large companies are still running on the x86 architecture? I know I have old laptops still running those processors, though I'd like to think that most companies have a hardware refresh rate that's no longer than 5 years, and most laptops and servers would be x86.

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