I don’t know about the EWaste part, I own a 2015 MacBook Pro and that thing is immortal! Still runs as smooth as the day I got it and it’s seen a lot of abuse.
Don’t know of many other brands that have this type of longevity. Out of the many laptops and PC’s that I owned, non lasted this long.
That’s a respectable age for a Laptop but nothing special, I used and even owned multiple older devices from various brands like Lenovo, Asus and HP and you just got lucky that you aquired the Pro rather than the Air with it’s “high quality” Butterfly keyboard that apple build into four or five generations with minimal tweaks that didn’t fix the breakage and only covered two of them!