Is it really, though? Just for kicks, last year I got an ibook g4 for a few dollars, and I got Minecraft running on it, not the absolute latest version, but one a few years old (Minecraft dropped 32 bit LWJGL support a bit ago). With some tweaking, I managed a solid 40-50 FPS, on what would have been a pretty anemic processor back in ... 2002, 2003?

Although, maybe it doesn't count as I used mods like Optifine, which are made to ... replace said un-optimized code, but I thought it was a good showing for Minecraft and the JVM anyway.