I think they have done the black jerseys maybe three times. I know one was when Bama destroyed them in Athens and one was in a bowl game.
Top programs don't usually mess around with their uniforms. Their brands are well known and they want to keep them that way.
Correct, they wore black jerseys against Auburn and Hawaii in 2007, Alabama in 2008, and black helmets/pants against Florida in 2009. Then they did the all red with alternate red helmets against Boise State in 2011.
After that, I don't think they wore alternate uniforms until Kirby took the job, and they pulled the black jerseys out for a game in 2016. They wore black again against Cincinnati in the Peach Bowl.
It's not true that top programs don't "mess around" with uniforms. Oregon is definitely a top program and wears a different uniform every week. That's their brand. Ohio State wears alternate uniforms. So does Oklahoma. Michigan wears different combinations based on their school colors. Florida State wears different combinations, as does Washington and Notre Dame.