This is something that's been asked since the introduction of consumer-level processors bearing the “x64” nomenclature. It feels like just yesterday that Intel and AMD fanboys were at odds over the Athlon 64. At that time and even as recently as the introduction of Windows Vista, software and drivers for 64-bit setups were slim-pickings.
Analogous to the shift from 16 to 32-bit computing, the jump to 64-bit has been a slow one. Windows XP x64 never took off, though 64-bit versions of Vista did, thankfully. The ride was a bumpy one, but hardware manufacturers and software developers alike have finally widely adopted the 64-bit architecture - and there’s no turning back now.
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