Are plastic bed risers safe, or should I get wood?

Mainstream home publications and r/DIY commenters generally consider thick polypropylene risers like Utopia Bedding and Home It safe for typical beds at their rated capacity. Wooden risers (FASONLA and similar) are favored by reviewers who want a more furniture-grade look or who distrust plastic under very heavy frames, but they're usually not stackable and cost more per inch of lift.