You have equipment you use on a daily basis. It's lifespan is coming close to an end. Are you the kind of person to wait until it breaks down or the kind of person to buy another right away?
I'm shopping, but it is likely I can keep it working indefinitely. Discounted aftermarket parts are usually a lot cheaper than buying something new, and if I can get or make the part, I can probably fix whatever it is.
It's called preventive maintenance and its what I do.
I have a ten-year-old vehicle with over 200,000 miles that I kept expecting to break down. It's still going so I will keep it till it dies.