It is sometimes about instant gratification and that can cost one bucks.
dewey you are right about 'that model that saves money' can cost big time in other areas.
if it ain't broke, don't buy new. Replacing perfectly good working appliances without them being totally beyond repair is a money waster.
Of course there is always that tipping point. when the repair isn't worth the cost and buying new is smarter. We all know this. You just have to apply the reasoning behind your stuff and buy new when required or hold onto it and squeeze every dime out of that purchase.
and the other example of the suspension/shock absorbers is good also. Some things when failing a bit should be replaced obviously. You don't wait for total failure. Things like this should be obvious to most. Brakes wonky, eh, should I wait til they fail? UH NO!