1. digitally, it's 0 or 1. on or off. do or do not. there is no TRY.
2. it will work day one or not. USUALLY, if it works out of the box, it's good for a while.
3. if failure occurs soon enough, your credit card provides additional compensation.
4. if it appreciates in value: buy it. if it depreciates: lease (rent) it.
5. finally, proprietary screws open opportunities for the after-market.