There are also many that have one good song and a bunch of wannabes whining other tunes to the same words as the good song.
Or, there are really good songs that just don't make it because there already is a classic with those words.
Case in point (and a great "fun fact"): Avrohom Fried purchased the song "
Vezakeini Legadel" from Yossi Green ten years before it was released on his "Keep Climbing" album. He was going to release it when he bought it but then Boruch Levine put out his debut album with the classic "
Vezakeini" on it, prompting Fried to hold the song off for ten years. Even after its delayed release, the song never got the thunder it deserves (IMO) because Levine's song still dominates with those lyrics.
(Interesting side point: this also gives insight into the fact that this is the lone Yossi Green song on that album. Fried was not happy with the style of songs Green was offering at the time, so he declined buying a song. But he had a Green song from a decade earlier.)