Board Thread:Naruto Discussions/@comment-34436445-20180627113230/@comment-31099706-20180630010304

I thought Madara and Izuna awakened their eyes over the death of their siblings and not by some forceful awakening, but I can be wrong.

No, Madara and Sasuke just happened to be the only ones to acquire this final form. Indra never had a EMS, just a MS. Itachi was close to reaching his EMS.