Stuff wears out and technology moves on. There's nout wrong with replacing your tatty, worn old stuff for something newer and better.
no point about getting sentemental about that old thing that works adequatly, when you fancy something newer, maybe more effecient, better working with built in GPS?
Yea, you can go too far and become wastefull just because you want the new shiney thing, but there's a middle ground between being Armish, and being a super consumer.
Without a little consumerism, there wouldnt be the same level of technological advances, you might still be listening to the wireless, maybe you wouldnt have a TV and you sure as hell wouldnt be on an internet forum to find out where's a great place to ride etc.
So perhaps its not the root of all evil as some would make out. I love maintaining stuff, and I based my career around fixing stuff thats broke rather than needlessly replacing it and adding to landfill, but I'll not be feeling guilty when I get my consumer fix either! 8) its a balance.