, In my opinion, it's up to the individual considering the new gun, and it's intended use. There's a lot of factors in the equation. Competition, Combat shooting or strictly personal protection?
I agree the 40S&W is a good round. Generally speaking, it's slower than a 9mm, with more punch value. With that said, as Xracer reiterated... the 45cal, round is time tested and "is the standard against which all others are measured."
The evolution in our local PD's were 38's, 357's. 9mm's, then and now 40S&W.
But, on the fireing line you're liable to see a range of calibers.
As far as KABOOMS (guns blowing apart), you could have possibly read here at TFF, the misfortunes of the GLOCK... certainly NOT