A suit against John Deere is a lot harder in the way that the Vizio suit is being done (there they are suing as an end-user, a third-party beneficiary of the GP

A suit against John Deere is a lot harder in the way that the Vizio suit is being done (there they are suing as an end-user, a third-party beneficiary of the GPL contract), because you would have to be a Deere customer first (presumably that would cost more money than Conservancy's budget for the Vizio lawsuit) and if you do sue, maybe they stop selling you tractors or software updates or stop taking your phone calls. A regular copyright violation lawsuit might be a better option.