New rule, no change - has cricket missed a trick again with bad light?

It is one of cricket's oldest and most frustrating problems: bad light. The issue has reared its head again this week in the fascinating first Test between South Africa and Australia in Durban, wiping out more than 60 overs across the first three days. The fact a solution was added to cricket's rules just last week, an option so far unused around the world, only adds to the frustration. Play is already starting at 09:30 local time in Durban.