Various (community members cite multiple component brands) DIY modular mattress system (latex layers and/or pocket coil base)
8/10
Community sentiment supports DIY modular mattresses as durable when built around latex and/or pocket coils, with frequent reports of many years of service. Durability is also linked to modular repair/replaceability (topper/layer swaps) rather than replacing the entire mattress when sagging starts.
