100% crews in the barracks are 100% only for the tank they are trained for.
they become 80% crews if retrained in other tanks, so basically useless... except...
they do nevertheless have a perk: if you put them in the tank they are trained for, they can have crew books applied, and then retrained for another tank, using their unassigned XP to retain 100% training after reassignment.
so... if these are 100% crews trained on a premium tank that is used by another of your crews, and if you have a lot of free barracks slots, then it can be useful to keep them around, incase you would want to train another crew.
this is of course for F2P accounts. wallet warriors can just carry on spending $$$ to achieve the same much faster and easier.
Edited by HassenderZerhacker, 03 December 2020 - 05:56 AM.