I guess the trade off is, there are better bullets out there, and they cost at least 2x as much. The cup and core style bullets have killed millions of animals in the last 100 years. Old school gun writers would always recommend heavy for caliber size bullets. This did 2 things, it kept velocity manageable, and it insured you have enough bullet weight to insure a dead animal.
For me, rem corelokt a and SST bullets are fine for most game in most guns. If I were to spend 10s of thousands for a hunt of a lifetime, I would likely invest in a better bullet as an insurance policy, but not for normal backyard hunts. It's not worth the extra expense in everyday hunting.
Like you said, you recovered both elk, so at what point is the bullets failure measured. Had you recovered the animal with good bullet placement requiring a half day tracking job, that would qualify as a problem, but you did not provide too much info around the circumstances of your experience. Was that the case.