I have a 1989 Glock Model 17 pistol with who knows how many thousands of rounds through it. Like me, it is "middle aged." I am thinking about getting a CCW gun for my senior years, and I am thinking about a Glock Model 36. I am thinking that seven rounds is just about adequate for a single opponent, but if I am attacked by two or three thugs, the seven shots might be inadequate. Should I just stay with my aging G17?