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!
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!