I don't get the issue, Most people keep their cards for 2+ years, I paid a total of £50 interest over the period in which I paid monthly. I really don't get the outrage.
There's a group of people that were raised with the mindset that it's extremely foolish to buy a quickly depreciating asset on credit and to pay interest on it. This mindset is now very rare, as times have changed and it's now much more common to buy depreciating assets on credit.
Though these days it's very easy and normal to get attacked and judged on these forums (and most other places) just for having an opinion or doing a thing. If you buy an Intel CPU for gaming for example, prepare to get strung up!