I use footprints and have had great luck with longevity, I've also had zero leaks. I use them in the winter to prevent the tent floor from freezing down. I'd rather tear up and fight with the footprint than the tent floor. Rare, but it can happen. I've had Sierra Designs and Big Agnes tents with their own footprints, but I recently purchased a cottage mfg. tent and have been using Polycro, better known as window insulation kit plastic. It's tough and weighs less than half of Tyvek, doesn't crinkle and isn't as slippery. I have used Tyvek under the new tent and as a ground cloth. Rather use the Polycro.
You can wipe off the Polycro and it folds up to @ 1/3 the size Tyvek does.

FYI: Longevity is defined as 300 nights on one of my tents and the floor is still perfectly sealed. The fly is currently at Big Agnes getting a rip repaired, the tent body needed nothing. I expect and need tents to last for years.