Correct.
- hitting the power switch ... will power off the box immediately
or delay 5 seconds before power off .. more bios code ..
Conditionally wrong. Machines I install now do a graceful shutdown.
- you can't "remap" the bios code to something else ...
and if you did, its not "user friendly" since its not standard
for everybody on every pc
( all machines should behave the same way to prevent confusion )
If you run a box with just two cables - power and network - then the
power button is a sensible tool for shutting it down.