I am not sure you will ever find a consensus here. FWIW, the difference in sound between 5 foot and 6 foot is negligible but the distance from amp to speakers can easily be more than 5 feet.
is there a consensus on too short speaker cables?
I normally use 6 ft cables - which are in abundance used. 8 ft seems to be more common. I'm going to get new cables and intend to go with 5 foot length - since this is as long as I need. My only reservation is given the fact that selling them is inevitable next time I upgrade - would 5 ft be less saleable than 6 ft? Is this nit-picking?