Maybe it is just less commonplace, but it really angers me to buy a device where I cannot replace the battery with a little effort once it is out of warranty. Mp3 players, phones, tablets, ereaders, it should not make a difference.
So far I have only owned devices which, while not always easy, have been possible to repair at home with a little patience. $80+ to replace a worn out battery you can purchase for $3 is ridiculous.
Teardowns like this do help some of us. I do not think he is trying to say don't buy one, just realize it may be dicey to do a simple repair on this when the warranty is up.