im saying this because with all the DBZ references.
i just realized that all the uchiha with ms with the help of tsunade the hyuuga's yamanaka's and maybe Yakumo could have created a good teaching training methods for their shinobi by using the uchiha Tsukuyomi on them.
it would be almost like the time chamber in dbz for Tsukuyomi your in their for 2 or 3 days while in the real world only 1 or 2 min have passed this would save time help pass those who r ready to be shinobi and help train and increase their skills chakra and justsu as well.
It also will test their limits prepare them for war death anguish missions betrayel resolve weaknesses failure torture and truth.
i for 1 think this is a well thought out idea cause lets face it the leafs academy training is a joke the mists was brutal and cruel but effective and the other villages well we dont know there academy training methods are.
p.s if ur wondering why i said
tsunade cause she has good healing skills for the uchiha and those too weak to the tsukuyomi the hyuuga and
yamanka and hyyuga after seeing ino and hinata hit obito they can do that and put more people in the tsukuyomi thus saving more time and effort
Yakumo well because we know what she can do
p.s.ps.s also for profit they could use it for people who want to dream like in inception or perverted men and women in a false fanatsy where they u know................