>With mechanical keyboards made for gaming (Razer and Corsair) I've had the caps start to fall apart and break after ~2 years of regular usage. The most frequently used switches also tend to start showing signs of wear and tear after a while.

That's why a lot of people into this hobby get pcb's where they don't have to solder in the switches and if ever a switch breaks they just pop in a replacement or pull the switch apart to see what's wrong. Similarly if a keycap `falls apart and breaks` although i don't quite know how this managed to happen for you