moreover, the cricketing world went many many steps further since those oldies steped over. can they cope with the new techniques and all?
Younger sides will have an edge in terms of agility and as such they can be trained to be sharper fielders which is a "must" in international cricket. Just look at India and Sri Lanka.
Having said that, as highlighted in Shewar's piece, there shoulkd be a role for these seniors and maybe they are not contributing fully to the development process of BD cricket.