The issue with the hypereutectic pistons, and a combination of randomly high heat and high pressures. The silicon content in these pistons is not always uniformly dispersed. Anywhere from 12% to 19% silicon could be in each individual piston, resulting in uneven heating, expansion etc.
Monitoring knock feedback is a must. Ensuring the engine has the fuel it needs to prevent premature detonation will definitely keep your engine running longer.
Hope this helps