Prevention of Decline Phase of PLC
In markets where the product cannot reach saturation, for example foods
where you need to re-buy daily then you can avoid the possibility of reaching your peak selling point (bearing in mind that the population and therefore consumer numbers are always increasing).
However, also some other non-necessary products can go on for a long time, Coca Cola
is very much similar to the food example but unlike food it has had to take a strong hold of the market and almost monopolise it through its ability to benefit from economies of scale.
But otherwise, I'd agree its almost impossible to avoid the decline phase.
Most companies try to come up with an addition/advancement
on their previous products to hit new peaks with their newer products as they hit the decline with the old ones. E.g. Phones- phones with cameras- phones with bluetooth-phones with internet etc.