Is it time to hang it up?

Came across a great article from Bob Sweeney on when is it time to hang it up.
Is It Time to Hang it Up?
Hopefully many of you aren't in this boat, but as Bob points out simply that has to be the case in a lot of situations.

"It does not matter if you have been in the business for twenty years or twenty minutes. At some point in time, changes need to be made and merging or selling might be the solution."

Does Bob have some good points here or is he trying to merely promote his own agenda...