Have you ever thought about how much work will need to be done to redeem the dead? Being an engineer, I had to crunch the numbers.
Assumptions:
1. There are 7 billion people on the earth now
2. About 7 billion people have lived on the earth before now.
3. There are 13.5 million members.
4. Half of whom are active and able to go to the temple.
5. Of those member aforementioned, 2/3 of which are temple age.
6. Work will not be repeated for the dead.
7. Excluding all who are born during this time.
8. Including all who are currently alive.
9. Exclude any time for genealogy and name preparation.
Those members need to go twice a week and complete all the ordinances for 30 years to get the work done! Considering I don't think that many of my assumptions are accurate, there is likely much more work that needs to be done.
