I am a bit surprised at not seeing any reference to Second Life in this article. Is this because it (quickly) turned to more "mature" themes? I ask because bot

I am a bit surprised at not seeing any reference to Second Life in this article. Is this because it (quickly) turned to more "mature" themes? I ask because both the exploratory and (more importantly) the build/customize parts were a big element of that - also, it is still active (I believe) even if not exactly "thriving" today.