Barkley, check your stuff before you call someone else an idiot! The all time series is 49-47-1 in favor of the packers.
As for the dome, at the time the metrodome was built multi-purpose stadiums, dome or open were all the rage, and playing baseball in Minny they wanted a dome (and should have put at least a retractable on the Twins park)
The dome is what they could get built in the early 80's. They didn't have a lot of choice, the old Met was falling apart and this is what they got.
They are working on plans for a new stadium to try to get passed in the state legislatures. They have all three: open air, retractable, full dome proposed. The open air would be the cheapest therefore it may mean the return of open air football to Minny in the near future.