If you talk to any tactics or firearm instructors, like Massad Ayoob, John Shaw(Mid South), Clint Smith, James Yeager, etc they can tell you of pistols that break or have frames crack.
It's rare but it does happen. Weapons are designed to withstand 1,000s of rounds but some wear out or break.
To my knowledge, the HK USP & P2000 series are one of the few that say they can handle +P+ rated ammunition.
Alloy frames like the 92FS/M9 or SIG P226/P229 are not ideal for regular +P/+P+.
Every 2nd matters.