When you get sick and tired of reapplying those adhesive felt furniture feet to all your furniture every time they come off (go ahead, look under something; a lot of them are coming off or missing aren’t they?), you can get these improved ones that I found a few years ago.
The round metal rivet hammers easily into the end of the leg with a tack hammer, and the metal part doesn’t break like the kind with the single skinny nail in the center. (And the adhesive kind, as you no doubt have noticed, do not stay properly attached for very long at all.) I have never had one of these fail yet.