Ksplice provides updates without reboots

Telephony exchange systems based on Erlang are used on all 5 continents (as far as I know) - that's real enough to me. On the other hand, if the target audience of KSplice Inc. can't afford spare hardware, will they spend money on the services of KSplice Inc?

Also there's the "false sense of security" expression thrown around when a not perfect solution is given to a problem - ksplice could give "false sense of reliability".