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This question asked why wizards couldn't use firearms to defeat Death Eaters. There are a variety of answers, but the lurking question there, I think, is why the wizarding world doesn't adopt certain everyday Muggle technologies (or make a magic-based equivalent) that would make their life easier. Some examples that come to mind are:
Pretty much anybody who needs to write anything uses a quill, an inkwell, and parchment, despite the fact that this is inconvenient compared to a ballpoint pen and regular printer paper.
When wizards go shopping, they have to carry a satchel with coins minted out of precious metals, instead of using a more convenient fiat currency (banknotes, small coins minted out of inexpensive metal). Perhaps wizards have decided that they really want their currency backed by a physical commodity, but then, it would be easier to create the magical equivalent of a debit/credit card, which would magically transfer an agreed amount of gold from the buyer's vault to the seller's without having to physically carry the gold into the shop.
Certain basic safety features on magical equipment. For example, a child-lock on wands, so that kids don't go out casting spells they are not qualified to use (remember that Harry Potter nearly killed Draco Malfoy because he used a spell he didn't understand), or the equivalent of an "are you sure?" dialog box on the floo network, to ensure that you don't send yourself to the wrong destination.
The magical equivalent of an e-book reader: a single piece of parchment that displays pages of whatever books you have "downloaded" into it. Again, it sounds more convenient for students than having to lug large books around.
What strikes me is that wizards are actually quite adept at creating magical equivalents of muggle technology when the plot demands it. There are various occasions where two people on separate locations talk to each other through fireplaces, which is clearly the magical counterpart of Skype. The coins that Dumbledore's Army uses to communicate are effectively equivalent to having push notifications from a newsgroup into your smartphone.