A lot of people are very like NBA basketball. But I always can't to pay attention to these. Hope you will see what I mean.
The team's average age assume that each member of the team is playing a role of equality. Obviously, is not the case. A 25-year-old starter is more important, a team of more than 40 deep bench player; Why do they age is given the same weight? Come up with a meaningful measure team's era, we need heavy age is a large number of minutes, each team members play.
To illustrate this point, let us examine the oldest team through the simple average age from 1994 to now: 1997-1998 knicks.