Donaire might have thought of retiring when Inoue didn't move, but since Inoue has moved up, he feels that there's an opportunity again for him to become a champion. So he is waiting for another shot that, until now, hasn't happened yet. As fans, we will continue to be hopeful to see him fight again and witness him win using his signature punches. Right now, there's nothing we can do but wait, as eventually he will get a championship fight.
Donaire actually has a relatively old age and deserves to retire but as you said since there is a chance to get the champion he is still waiting for some fights for the title.
There have been many championships he won during his career in boxing and he is one of the many boxers to have world titles in all four weight classes.
I'm still curious and waiting who knows who will be his opponent in fighting for the title in his class.
I'm not really sure what you mean by deserves to retire? As far as we know he can still fight, it's the timing though, Inoue is rising up and they are in the same division. And I will agree that age has a factor for Donaire losing those 2 fights.
However, since Inoue has move up already, Donaire has a good chance to win another belt, maybe this fight we will see him becoming a champion again.
That's why we are all interested and excited to see this fight. And now that we have a date, it's barely just a month from now.