Perfection needs to be defined in order to be sought. Usually there are too many trade-offs for something to hit 100% on all axes. For example, what is the perfect car? Is it one that can carry your entire family plus a month of groceries, one that costs very little to run, one that's super-safe or one that goes extremely fast? You're not going to get all of those factors in one car. At most, you'll get two, and as a result will bottom out the others - a fast car that holds your whole family will cost a fortune to run. A fast safe one will hold a driver and nothing else. A big, efficient car won't be very fast. The point is that there is no such thing as absolute perfection, which means there is no such thing as absolute progress. Instead, we just have fitness for a particular purpose and change.
Mokalus of Borg
PS - The trick is to recognise what is and is not a trade-off situation.
PPS - Which can be tricky.