Unspecified (component-based DIY build) DIY modular mattress (latex layers + topper system)
8/10
Community sentiment suggests modular latex mattresses/toppers can last substantially longer than typical all-foam beds, mainly because failed comfort layers can be replaced independently. Multiple commenters report 6–8+ years with minimal change, though some note eventual topper/layer replacement needs and cases of heat or sag depending on setup.
