If I were to have a blowout, I would want it on a non steering tire. I also never change the direction on a radial tire. Front to back and back to front on the same sides. $1000 for tires is worth my safety.
If I was always driving in town, slower speeds, I would be more inclined to get every single mile out of my tires. Highways speeds, no way.
This ^ having a front tire blow can endanger you and the people around you!