Reasons to keep? I can't think of a good reason NOT to have one.
I think every serious Photographer or amateur (or anyone in between) who enjoys photography and capturing scenes and events should have a portable or Point and Shoot camera. I'm not gonna lie, I take my DSLR almost EVERYWHERE I can, but sometimes having a full sized (K-7) body and lens isn't always feasible, practical or logical. I have a P&S with me in my messenger bag almost every time I leave the house. I have a couple of P&S's now, but only reason I have two is because I just bought a Panasonic LX3 to replace my standard little P&S because I figured if I was going to have a P&S with me, it may as well be the best one you can get and also be Photographer-friendly when it comes to advanced features and manual control (and RAW). If I didn't have a P&S, I'd be missing more opportunities than I am comfortable with.
Here's my new P&S:
https://www.pentaxforums.com/forums/off-brand-camera-discussion-canon-nikon-e...0-new-toy.html
Jason