Re: teacake does Stargate: punch it
They killed Janet off because they thought the show was ending that season (and season 5, 6, 8) and wanted to show that no matter how many times Daniel comes back from the dead that death is still a real thing everyone faces when they go through the Stargate.
"Did you (republicans) fall down,hit your head and think you woke up in the 1950s? Or the 1890s? Should we call for a doctor?" - Senator Elizabeth Warren.