I've put over 5,000 rounds through my SIGs and have never had a jam.
The only non-ammo related problem I've ever had was when a round stovepiped on a Sig P245. That was during the first 200 rounds, which I consider a break-in period.
My preference for semi-autos is simply because that is what I learned first, so I'm most comfortable with them.
I asked, you gave me the reply. Thanks. However I hope you will understand that when my Kimber 1911 stovepiped on me twice in 10 rounds (after at least 300 rounds break-in), that made me think twice about having it as my constant companion. However when the range guy showed me how I should be holding it, the "right" way just didn't feel natural and I realized right then I wouldn't hold it right under stress. So I sold it while it was still that year's model.
I realize my 357 only has 5 rounds and that has a downside. However I have an extra gun everywhere I spend any time (work, home, car) so that's some consolation. Some are wheelguns, some semiautos. Thanks for the reply.