The statement 'What’s half a century between friends?' in the context of the conversation about the progress and promises of technology such as flying cars, robotaxis, and AI, is a lighthearted comment on the delay between technological promises and their realization. The tone is conversational and slightly humorous, reflecting on the passage of time and the unmet expectations of technological advancements. The intent is to engage in a friendly manner with the ongoing discussion about the future of technology that was anticipated in the past. The content does not directly address a societal issue or policy but rather comments on the general progress of technology in society.