These old machines are slow, too. While you can technically install Solaris 9 on them if you have enough memory and hard drive space, the CPU's are just too slow. A single 50mhz 32-bit microSparc, like in my Classic, just doesn't have the oomph of a multi-processor 64-bit UltraSparc machine. It's like comparing a Powermac 6100/60 to an octocore Mac Pro.