For the past few days I've been using Instinct, the text message assistant that just raised at a $2.5 BILLION valuation. It's an exceptional product, and the most proactive personal assistant agent I've used. But it's doomed and their investors are going to lose all their money. It's a perfect example of feature not a product. The moment that OpenAI or Anthropic launches an integrated iMessage agent, it's game over. Why would I want a personal assistant that doesn't have access to the…