} As a thought experiment, if every sender offered a POP3-esque service
} rather than sending mail by SMTP
How is that different from DJB's IM2000?
It's more like RSS. But I take your point.
I think there's a difference due to the different update and query
patterns. Anything that requires a high update rate and global
consistency is really hard and doesn't parallelize well. That's why
ATM networks and airline reservations still use million dollar
mainframes rather than farms of PCs.
R's,
John
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