Have you every wondered why biblical scholars write so many commentaries on biblical books? Prof. Alan Lenzi has some very interesting reflections on the question over on his blog (click here).
I'm sure it's true that much commentary writing is just the field re-writing itself on a cyclical basis---and the cycles seem to be getting shorter all the time! Makes you wonder if all your efforts as an author will really be remembered for long! On the other hand, I think of many useful commentaries that have appeared since I was in divinity school, that the church and the guild really are the richer for.