The argument I usually hear is that you only truly get the 10x improvements with <new-model> (right now, Opus 4.5), so they've only had a few months, not years. In a few months, it'll turn out that <new-model> wasn't actually capable of that, but <new-new-model> is, and as that's not been out long its unfair to judge so early. And so the cycle begins anew