Methodology v1.0
4 change(s): 3 moderate, 1 minor | Durability score reflects mixed long-term user feedback: some users report phone holding up well after 2+ years (2025 reports), but multiple reports of heat generation issues, potential green line defects linked to heat, and waterproofing concerns noted. Material quality score lowered due to plastic back design perceived as cheap, display downgrade vs prior gen, and reported heat management issues in later firmware updates. Brand reputation reflects Samsung's strong overall position but tempered by acknowledged design compromises in S21 line (marketing as 'cuts') and firmware update issues causing performance degradation without easy rollback options.