Will entropy eventually destroy even an open and efficient system?

[D_Baine]

I'm no expert but, as I understand it, in an open system, one that can take in energy and matter from outside of itself, the overall entropy level can be prevented from increasing (and can actually decrease) under the right conditions. I have three questions:

1. Can the kinds of quantum fluctuations that could produce things like Boltzmann Brains, create NEW energy and matter that could be put into a system, and allow it to continue, thus preventing its overall entropy from increasing, perhaps even DECREASING its overall entropy and, theoretically, allow said system to persist for eternity?

2. On the other hand, could quantum fluctuations, in and of themselves, eventually destroy the system in some way?

3. Besides quantum fluctuations, are there any additional but perhaps little known (or possibly not well understood) phenomenon which, at some point at time, could cause an otherwise undisturbed open system to have its level of entropy increase? I'm basically thinking of a system that could just keep going, so long energy [and matter, I suppose, to replace its worn out parts] kept being put into it and it was not physically harmed by outside forces...is there something else which would or could, possibly, eventually make it break down?

 

[anuttarasammyak]

I am not an expert neither. Quantum fluctuation often has variations and even with small probability takes far from average value. I assume this nature prevents to construct forever continuing systems.