And also ensure they can continue their journey to having 1TB large game assets, as suddenly hundreds of 3D modellers need to create thousands of new foliage models each.
Creating realistic looking trees is one area that has now been almost entirely automated with tooling - there are some absolutely incredible tools for generating whatever kind of tree you want in any number of permutations. So really this would be more like 2-3 people just in charge of verifying the output and making sure it's stylistically consistent.