This is a video where a familiar Youtuber for Linux offers a summary of Linux. I am generally a reader, but occasionally I find videos that offers a unique technical view in our world of technology; especially Linux.
My description of this is "A Summary that arranges Linux and its subsystem-products in a 7 layer hierarchy" where he peels back each layer methodically. It is found here and titled "Linux is a Major Rabbit Hole"
Enjoy