Open the Microsoft Copilot app this week and it may be missing a few things you used. As of 18 August, Microsoft began retiring a clutch of free consumer features — the standout being Deep Research, the tool that turned a prompt into a long, sourced report — while it folds its two Copilot apps into one. The most useful of them doesn’t vanish so much as move: the in-depth research successor now sits behind a paid Microsoft 365 plan. Answer first, because the shape of the change matters more th...