Does Intel ME waste energy, too? Of course it can have security flaws, complexity that should not be required, etc, but I would expect with these messy things

Does Intel ME waste energy, too? Of course it can have security flaws, complexity that should not be required, etc, but I would expect with these messy things that it would also waste energy on unneeded features, too. What is needing, is computer system that does not have such features. I do not know if this will be possible as a PC with 64-bit capabilities, unless perhaps it is using RISC-V for 64-bit capabilities (in which case it is a not a "PC with 64-bit capabilities", I suppose, but rather two separate systems). An open-source implementation may be usable, possibly using emulation or FPGA for 16-bit x86 real mode, and for PC BIOS capabilities if needed. However, it is then not 64-bit x86, which means that a specialized booting is needed if you want to run operating systems other than DOS. (Another alternative is to not implement PC at all, which may also be suitable for some uses.)