I bought my 1st DSLR, a 550D, exactly 2 months ago (on 3rd April) and I still don't have a dry cabinet.
I bought my DSLR at SLR Revolution and I went there to buy a screen protector for my 550D 2 weeks ago. While there, I was talking to the salesman who had sold me my 550D 2 months ago. I was asking him about where I can get a good deal for a dry cabinet and surprisingly, he told me there's no need to buy a dry cabinet. He said he personally doesn't have a dry cabinet and he just keeps his camera and lenses in his camera bag. So, I did not buy a dry cabinet that day since I trust the guy. FYI he is the same guy who told me there's no need to buy a filter for my lens when I asked him if he was selling filters. That was on the day when I bought my camera.
However, I've always been taught to never trust what people say 100%.
So, I'm asking all my fellow CS'ers:
Is a dry cabinet REALLY necessary to store my DSLR and lens?