Simplify the following text for a Grade 9 native English-speaking person.
Original: The bands Blue Mountain , Whiskeytown , Blood Oranges and Drive-By Truckers further developed this tradition before most began to move more in the direction of rock music in the 2000s .
Simplified: The bands Blue Mountain , Whiskeytown , Blood Oranges and Drive-By Truckers kept going in this direction before most began to move more in the direction of rock music in the 2000s .