A lot of newer games probably include middleware licensed from other companies that make relicensing more challenging
I'm running a Irix 6.2 desktop on my PC right now.
Also fun fact: up to version 6 of the MIPS port of NetBSD, you could run Irix binaries. I'm pretty sure it can boot in qemu-mips which would be another avenue for some ability to run certain Irix software on PC.
I’m sure I’m not the only one (though the number is vanishingly small). It’s difficult to know how large the community is without nekochan.
Hope springs eternal. :)
Commonly Physics Engines, like Havok and others.