No? That would be getting into semantics.

Nothing is by definition no thing. Therefore when I say nothing is forever, I'm not stating that an absence of things is forever. I'm saying no specific things are forever. The laws of the universe essentially don't allow it as we understand them. Even the heat death of the universe will potentially undergo some form of transformation. There has been speculation that there will be some inverse of the big bang at some point.

But our best understanding is that due to thermodynamic entropy there will always been a natural inclination towards disorder and this is especially relevant in the context of heat and energy which is to say that any system reliant on such would eventually succumb to failure or at least an inability to maintain structure and control which in the context of life... in whatever form we're talking about would be failure.

Say thousands of years from now a human was built into a computer and could essentially keep itself going through successive creation of robotic components/bodies/etc. But it essentially has the ability to outlive biological limitations. Well it would still likely run out of energy at some point. So how would it resolve that? Use other energy systems? Systems reliant on exotic matter? Seemingly limitless fuels? Well that's just it, nothing is limitless. There is a finite amount of anything that exists in the universe and barring some sort of perfect ability to convert energy and matter back into either form over and over forever (Which by the laws of thermodynamics would be as we understand it impossible) you're still going to hit an end... it may be a very VERY long life but it would not be "forever".