Mac’s don’t die, they just evolve. If a Mac won’t boot it is really telling you don’t want to do what you were about to do.
Just like any other OPERATING SYSTEM.....it is completely transparent to the hardware....a hard drive could care less what is stored on it, when one goes it goes.....
When your Mac craps out it's sign from above to send more money to Uncle Steve for a new one
 When my home assembled windows machine craps out it's a sign for me to get out my crescent wrenches