Various (community DIY builds; e.g., Arizona Premium Mattresses mentioned) DIY Modular Mattress (latex + topper system)
8/10
Community reports durability mainly for latex-based modular mattress builds, with long service lives and layer-by-layer replacement rather than full mattress replacement. Some users report early sag/heat issues with memory foam/fully foamed mattresses, reducing BIFL confidence for those configurations.
