There are more and more of us moving from shooting JPG files to RAW files recently. The supportive argument has been that the RAW file contains so much more information about the photograph which allows you to save a marginally exposed shot for example, which is true.
But here is another reason which resurfaced for me while Carla and I were working out how to resize a photograph in Photoshop Elements. (that discussion in saved in the forum). This is what we discovered in the process. If you use Elements you might open up a photograph and follow along.
The photograph that I had opened to work out the details of resizing was about 4.5 megs in size, not particularly big. But when I brought it into Elements and went to practice resizing it, Elements said it was something like 28.5 megs in size. How could that be? Well Elements was telling the actual size in memory after it had been uncompressed. The JPG file format is what is known as a LOSSY file format, one amongst several, that do a tremendous amount of file comperssion when they are saved to disk. 28.5 mgs to 4.5 megs on disk is a big leap, something you don't see with your RAW files, they are what they are big.... big all the time.
JPGs standing on their own in most curcumstances are fine. They are great for snapshots where little or no editing is going to take place and JPGs are for the most part are intended for the web. But a LOSSY file format goes under a lot of compression as we saw above and if you edit and save... then re-edit and save, each time information will be lost with each re-compression, as the name LOSSY implies.
There are several file formats that are called LOSSLESS. They do not compress or compress in a way that does not lose information. TIFF files are a good example of this as well as your camera's RAW files to name a few.
So don't turn away from JPG files, just use them in the right situation, for the right type of photographic work that you are doing at the time.