A wind-driven land vehicle can tack just as well as a sailboat can, and possibly better. If memory serves me, in the fully general case, all that's required is

A wind-driven land vehicle can tack just as well as a sailboat can, and possibly better. If memory serves me, in the fully general case, all that's required is an exploitable difference in velocity at the interface of two media (ground/air, water/air, etc.) to extract energy and move in arbitrary directions (or even do counterintuitive things, like go faster than either medium as a sailboat tacking downwind does). In space, a solar sailcraft is embedded in a single medium. So, no, no tacking.