Buy convertible if: You have seasonal storage needs (more freezer in summer for ice cream, more fridge in winter for vegetables), shop in bulk monthly requiring flexible space, host frequent parties needing variable fridge-freezer ratios, or want future-proofing as family needs change. Buy non-convertible if: You have consistent storage patterns year-round, prefer simple operation without mode changes, want to save ₹8,000-15,000 on purchase price, or prioritize maximum capacity over flexibility (LG 655L offers most space but isn't convertible). Convertibility value calculation: If you convert modes even 3-4 times per year (Diwali bulk buying, summer ice cream stock, wedding catering prep), the flexibility easily justifies the ₹10,000-15,000 premium over 10-year lifespan.