Putting LED lighting in a laptop lid is quite routine in modern laptops. All Lenovo ThinkPads have red LED lights that light up solid red when the laptop is being used, and fade in and out when the laptop is sleeping. Asus, Alienware, Gigabyte, Razer etc. laptops have glowing lid logos and designs. The Asus ROG Zephrys's entire lid has hundreds of user-customisable LEDs. Users can write stuff, or have moving text / GIFs flow across the lid if they choose.
The arguments that Apple cannot return to some form of aesthetic glowing logo because of engineering obstacles to placing LEDs in the lid, or having LEDs bleed into the screen, or requiring a backlit screen to do so are not correct: other manufacturers have no issues doing so.
The arguments that Apple cannot return to some form of aesthetic glowing logo because of engineering obstacles to placing LEDs in the lid, or having LEDs bleed into the screen, or requiring a backlit screen to do so are not correct: other manufacturers have no issues doing so.