Google's new "24/7" AI agent, Gemini Spark, can be shockingly good at doing things on your behalf. But I'm not sure it's worth the financial cost and potential privacy tradeoffs. The company gave me access to Spark last week. Google advertises Spark as an AI agent that can take on tasks and work on them in the background - even tasks that have multiple steps - allowing you to put your phone down or walk away from your computer. It also advertises at the very top of the Spark website that it's "a