What owners actually do with a robot mower is let it cut the middle of the lawn and then hand-trim the rest, because the machine cannot get at grass growing against a wall or flopping over a sidewalk [1]. The most advanced answer a US buyer can order is a deck that slides sideways, as on the Segway Navimow X4, and it still hands you the weed whacker afterward [2].
The implementations of the new reach differ in ways a buyer would care about. Segway's Navimow H5 Pro opens a side panel and pushes its own mowing blades out [4]. The Dreame A4 AWD Pro and the Eufy Lawn Mower S2 Max swing a string trimmer instead, and the Eufy arm turns vertical to edge a sidewalk [5][7]. Mammotion sells its version as an accessory that bolts to the back of the Yuba 4 AWD [6]. Three of the four build the reach in rather than charge for it separately [2], which is what a feature looks like once it has stopped being an experiment.
The wall in front of all of it is written as capability, not as a product list. The FCC FAQ describes the ban on "advanced robotic devices" as protection against "unacceptable risks to the national security of the United States" and reaches devices "capable of locomotion, obstacle avoidance, navigation, or movement on the ground" [8]. Gizmodo reads that as covering mowers, alongside the foreign-made robot vacuums already caught by it [9]. A definition that broad leaves the classification call to the importer, and what Gizmodo got back at IFA is the answer a compliance team gives when it cannot price a shipment: we are working to understand current U.S. regulations [10].
The grandfathering is what shapes the shelf. Devices already approved for sale in the US can keep being imported and sold, and current owners keep what they own [11]. American lawns therefore get extra years out of the models that cleared first, and any competitor who wants that shelf space has to bring a fresh approval with it, because an articulating arm is new hardware that needs its own clearance, not something a firmware update can add. Clearance date becomes the moat.
That also leaves the stated rationale doing odd work. The vulnerability Gizmodo cites is a hacker taking over a Yarbo automower and driving it across Verge reporter Sean Hollister [13], a machine already inside the country and untouched by a rule that operates on imports [12].
For anyone spending money this season, two things settle the decision. Is the specific model cleared, given that approval as Gizmodo describes it attaches to devices already through the door rather than to brands [11]. And is the arm the actual reason for the purchase, because if it is, the honest plan is to keep the trimmer and revisit after the November midterms rather than wait on a launch date no vendor will name. Gizmodo's list of escape routes is short: a change of heart from President Trump, individual exemptions, or a Democrat-controlled Congress, and otherwise years [15]. A Roborock representative was pinning hope on the late-September summit between Trump and Xi Jinping [14]. Nothing domestic fills the gap in the meantime, since there is no idle American home robotics industry waiting to build these [16].
