In the sentence, what aspect is incorrect: "It’s hard to believe that the twenty-year-old computer has software that is up to date?"

The issue in the sentence revolves around the phrase "up to date." The context implies that a computer that is twenty years old would typically not have software that is considered current or contemporary. In this scenario, the phrase "up to date" suggests that the software is on par with modern standards, which is unlikely for a computer of that age. This raises questions about the realism of the claim being made. Thus, the improper aspect here is the expectation that a computer with a two-decade lifespan would still be equipped with software that meets current technological benchmarks.