I could not disagree more. If we're talking about professional, high profile composers, CSB is the most appealing library currently available at the market. Why? Ease of use. See Noam's post above. Do you think James Newton Howard, Hans Zimmer or any of the top trailer guys care about separate parts or how accurate they can shape the attack of 1 in 1.000.000.000 staccatissimo notes of an ostinato line? No, they want "simplified" patches that simply work and get the job done.
Working composers only care about the end result and how fast they can get from point A to B. It's dog eat dog out there. Don't underestimate the power of simplicity. Of all current brass libraries in the market right now, CSB is the one that can be tagged as a true game changer and "next-gen" because it offers the working composer the best of all worlds: workflow, sound, price.
Things have changed, we're way past 2005 and Symphonic Cube monopoly. In 2019 even the small developer can change the game. Look at Performance Samples. Want to talk big and bold? Look at Big Bad Horns. Individual parts, a ridiculously large list of articulations, 449€. That's adapting and making your way into the templates of a wider audience.