I don't know if you are serious, but regardless of that, the James Webb space telescope will stay near the L2 Lagrange point. This is not a stable orbit, and left to its own, the spacecraft will drift away from the desired orbit. That means it needs thrusters to keep itself in place, and it will bring enough fuel for about 10 years of operations. After that it will slowly drift out of L2. Given the distance from earth, there is also no way there ever will be any service missions that the Hubble space telescope relied upon.

So no, James Webb space telescope won't be in operation for decades.