I would add 1a. Management buy-in to devote resources to clean up complete/unsuccessful tests. I witnessed first hand the ball of mud resulting in 10 years of

I would add 1a. Management buy-in to devote resources to clean up complete/unsuccessful tests. I witnessed first hand the ball of mud resulting in 10 years of test upon test upon test. It's a huge impediment to quick iteration; simple changes are hard and hard changes are impossible. It's especially bad because test code tends to be poorly designed and documented due to the get-it-out-the-door mentality.