For things which are effectively integers there is no paradox when your division results in a number less than one you have nothing or perhaps more accurately a

For things which are effectively integers there is no paradox when your division results in a number less than one you have nothing or perhaps more accurately a probability of having 1 but any given instance in actuality has either 1 or zero. Also equipment failure isn't a linear thing its a curve as things reach expected lifespan. For instance a battery which is nontrivial to replace has an expected number of charge cycles until your battery is so shot you can't really use it off a charger any longer. An increasing number of mechanical hard drives fail, charger sockets start failing. Heating and cooling cycles cause progressive degradation of electronics. You absolutely could design it to last 20 years with batteries that are easy to pop out and pop in as easy as changing a double aa but your customers won't pay a premium over a more disposable machine and indeed if your customer has a good experience over the 3-5 they actually use it for you make MORE if your hardware is designed to need replacement.