My drywall anchor fail taught me that not all wall fasteners are created equal.
I grabbed whatever screw was handy for hanging a mirror, but when it pulled out and took a chunk of sheetrock with it, I learned to match the hardware to the load.
Skimping on anchors is asking for trouble, learned that the hard way. My bathroom mirror crashed because I used the wrong screw for a plastic anchor. @hernandez.barbara has the right idea with metal toggles for heavier items.