The trouble with ACPI

Why don't people like ACPI?
Horribly complicated standard
500+ pages
Several person-years into Intel implementation 
ACPI implementations are huge
"ACPI Source Language" (ASL)
Requires in-kernel interpreter
~ 100K of kernel space
Closed-source device code
Security, reliability issues

Alternatives?
ACPI increasingly required to configure systems 
Perhaps a smaller, init-time configuration
Used with initramfs