"Ten years, give or take. More than enough time to adjust." More than enough time, as well, to accept and even take advantage of his new reality. "It was to my benefit, during that time, that I make my deficiency as unobtrusive as possible." At first, he simply hadn't known where Gladio would draw the line between 'pulling his weight' and 'liability to be discarded', and later... it was rather satisfying.