All my laptops are at least 3 years old, if not 7. My Nexus 7 is 9 years old, still use it every day. Taking care of something that doesn't need taking care of

All my laptops are at least 3 years old, if not 7. My Nexus 7 is 9 years old, still use it every day. Taking care of something that doesn't need taking care of seems to be a waste of time though. If the computer gets too hot, it'll slow down until it's not by itself.