A splitboard is essential if you want to access backcountry terrain under your own power. It splits into two ski-like halves for climbing uphill with climbing skins, then clips back together for the ride down. Without one, you'd need a snowmobile, helicopter, or chairlift to reach untracked terrain.
That said, splitboards come with real trade-offs. The split hardware adds noticeable weight, and the seam down the middle means slightly less responsive performance on the descent compared to a solid board. They're also more expensive and require additional gear like skins, split-specific bindings, and poles.
Don't buy a splitboard if you only ride at resorts or plan to access backcountry via snowmobile. They're specifically designed for human-powered touring—and that means committing to fitness, avalanche education, and specialized equipment. If you're just curious about backcountry riding, consider renting a splitboard setup or booking a guided tour first to see if it's really for you.