TI wasn’t really making trap music. He was a commercial artist from Atlanta. Trap Muzik the album actually has very little in common with the trap music sub genre.
Gucci and Jeezy basically birthed trap music as a genre, together, at the same time in the mid-2000s. Zaytoven and Shawty Redd established the trap production style via Gucci and Jeezy’s music from 2005-2009. Then came Lex Luger and Flocka in 2009-2011.
This video alone birthed more trap rappers, songs, and videos by itself than anything TI ever made. If you think Gucci wasn’t a factor until 2009, you were a casual, mainstream rap fan