Is a stretchy wrap or a structured carrier better for a newborn?

Across the reviewers we read, stretchy wraps (Boba, Solly, KeaBabies) are the consensus favorite for the newborn stage because they cinch snugly and mimic a womb-like hold, but specialist communities note they sag and become uncomfortable once a baby passes roughly 15-20 lbs. Structured and convertible carriers last longer and add back-carry options, but r/babywearing threads repeatedly warn that many budget structured carriers fit poorly on small infants until around three months.