Microsoft announced a slew of product upgrades to its Copilot AI bot on Friday, including longer memory and deeper personalization features intended to make the bot feel more like a companion and less like a Wikipedia-retrieval machine.Mustafa Suleyman, Microsoft’s AI CEO, believes this is the primary way AI companies will differentiate their products. It all comes down to personality, he told me on Big Technology Podcast Friday afternoon.With Amazon, Anthropic, Google, Microsoft, and OpenAI all...