Modern Chess, Opening Databases, 8 April 2020.
This variation might be a serious contender replacing the Old Main Line. It does, in my opinion, indeed lead to much more adventurous position than current Main Line of the Catalan, reached after 4...Be7 5.Bg2 0-0 6.0-0 dxc4. One little warning, or rather see it as an encouraging message, particularly the Main Lines after 4...dxc4 5.Bg2 a6, covered in the last chapters contain an incredibly deep, computer-assisted analysis. We aren't playing this system to equalize, but rather try to put White under pressure by sticking to our extra pawn. We are looking for our own chances! Most of the Chapters offer imbalanced pawn structures or material distribution, offering good practical chances to play for a win, once we leave the theoretical territory.