30 dvd’s x 3 days = 90
90 x 52 weeks = 4680
That amount is not unheard of at all. Of course, if one is burning 30 minute home movies versus 120 movies there may be some difference in life of a dvd burner.
Still, it is really hard to put a definitive number on it IMO. It is similar to asking how many miles one will get from a car… ie. how long will a car last.
However, as myke has shown, generally IMO, one should get a lot of “mileage” out of a burner.
BTW, People often times think their burner is dying because they are having a problem burning. But, in reality it is a DMA setting or something else that is the culprit in their burning difficulties.