Look at it this way guys:
In USPSA/IPSC shooting, the .40S&W cartridge is favored by "Limited" category shooters, largely due to some esoteric rules reasons.
These type of shooters tend to shoot LOTS of rounds thru their guns, both in practice and in matches. This is especially true of the GOOD USPSA/IPSC shooters. Thus, gun durability is paramount to these shooters, as it gets pretty costly to replace your gun often if you keep wearing it out.
And what type of gun do these guys prefer? Ones based on the M1911 pattern.
Yeah, there have been other patterns used by USPSA/IPSC shooters over the past 20 years, but most everyone in Limited keeps migrating back to the M1911 style. Part of the reason is DURABILITY.