[lloeki]

"Clamshell mode" is more than just not going to sleep when lid is closed: it still goes into sleep when you close the lid and have no monitor attached, which also means it goes to sleep if you unplug the monitor and lid is already closed, and out of sleep when lid is closed and you plug a monitor. (TBH I don't know if Windows does that or not)

There may be conditions around having input devices as well, can't recall exactly.

There also used to be a setting to disable wake up from bluetooth devices but it seems to have disappeared. (I was using that setting to prevent a DualShock 4 gamepad - which powers on all too easily - connected via bluetooth to wake the computer)