The firmware update cycle is heating up, but ArduPilot's 4.7.0 is what actually matters here. Three major open-source autopilot platforms dropped releases in quick succession—iNav 9.1.0, Betaflight's dual December drops, and PX4 v1.17.0—which signals serious competitive momentum in the autonomous flight stack space. ArduPilot's Copter release typically carries the heaviest feature load for traditional multirotor builders (not just FPV racers), so that's where the real innovation signal lives if you're building custom platforms. Betaflight's back-to-back patches suggest they're chasing stability rather than launching features, which matters if you care about flight-day reliability over cutting-edge performance.