I'm pretty sure that's because they are hard to program for. Although automatic compilers and instruction schedulers for VLIW machines exist, they aren't nearl

I'm pretty sure that's because they are hard to program for. Although automatic compilers and instruction schedulers for VLIW machines exist, they aren't nearly as good as hand-tuning. VLIW machines have a niche where a fairly small amount of code is both very arithmetic-intensive, predictable, and executed in a power-sensitive environment. In HPC and most business workloads, you just can't dedicate the labor required to making your code work well on them.