With the low cost of memory today, it would be a mistake to limit yourself just to JPGs. Post processing RAW images is a breeze with Lightroom which only costs $10 p/month for the Adobe Suite for photographers. Working with RAW images gives you much more flexibility.
I’m pretty sure the Canon PowerShot has the ability to capture RAW so he can give it a try. Once I started shooting RAW years ago, I never went back to just JPG and never will — no benefit to limiting my abilities.
Powershot can shoot RAW, I just don’t know if I want to spend money on an editing program if all I’ll be doing is posting to FB.. unless there are free programs that are useful?