Indian Defence Ministry set to replace windows with home-grown "Maya OS"

My main concern is support and delay b/w security patches the OS will introduce. I'm making a wild guess, but I think they should have lot older hardware devices and from performance pov, they should benefit given latest Windows are not that great on older devices and older win versions have already reached EOL.

If they do get it right, they probably need to retrain their staff to be able to use other apps like Libre Office and more.