I have not done enough testing to say "significantly outlast M1000 reeds". I have about 450 miles on the M7 at 14lbs, about 200 miles on M8 at 12lbs, and about 300 miles on the M1000 at 10lbs of boost.
The M7 reeds would have definitely failed by now.
The M1000 reeds still look great and the M8 as well.
Double stacking M1000 reeds is what I have done most, but 8 reed petals stock cost the same as a set of the Boyesens, so it is a better alternative there.
I would say when I have 1000 miles on them we could say "significantly last longer", but not quite yet. I will say better than stock and as good as double stacking and will post more as the miles come.
Hope this helps.