What makes X86 servers so appealing is their complete compatibility with X86 desktops and their moderate costs.
Xeon has 80% plus of the total market because of that reason and the extensive infrastructure Intel provides. AMD provides a junk processor with no infrastructure and only the Tier 4 outfits no one has heard about are using a few -- very few -- Floppers.
Note that Sun chose Xeon processors for their new Linux server model -- NOT Floperon.
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