There were only 2 Crossfield class Warships produced and they obviously had prototype technology installed when deployed, and, one was even destroyed after all hands were killed while continuing to develop the Spore drive, so is it so surprising for Discovery to have a Battle Simulation hologram? Real world militaries spend outrageous amounts of money on developing tech during times of War, and compared to the cost of developing the Spore drive, both financially, and with the loss of lives, a hologram simulation isnt out of the ordinary.
Many posters have an undeserved, or at least un-researched issue with some tech from a decade earlier being more advanced than that in TOS.
This is currently 2017. The fastest EVER passenger jet first flew a commercial flight in 1976,.....in 42 years we have nothing as fast as the Concord SST. The world record speed and altitude flight for an oxygen breathing aircraft, (not including Rockets) was in 1976 also, in 42 years we have no military jet faster than the SR-71.
It shouldn't be that surprising that a starship developed during such a devastating military conflict could have tech more advanced than a starship developed a decade later when Star Fleet is Exploring the boundaries of mankind.
Many posters have an undeserved, or at least un-researched issue with some tech from a decade earlier being more advanced than that in TOS.
This is currently 2017. The fastest EVER passenger jet first flew a commercial flight in 1976,.....in 42 years we have nothing as fast as the Concord SST. The world record speed and altitude flight for an oxygen breathing aircraft, (not including Rockets) was in 1976 also, in 42 years we have no military jet faster than the SR-71.
It shouldn't be that surprising that a starship developed during such a devastating military conflict could have tech more advanced than a starship developed a decade later when Star Fleet is Exploring the boundaries of mankind.