I view this as 'points vs squishies'.
Points are used to move vibration into the mass to which the point is pointed. This is an old principle- I had an LP mastering lathe made about 1950. Its anti-vibration stand used adjustable points for feet.
Squishies are used to isolate- this is to prevent vibration from something else (like a shelf) from entering a piece of equipment (like a turntable).
Platforms are supposed to be good at vibration absorption so usually the equipment placed on them has points that bear on the platform's surface. But it might have squishies beneath it to isolate it from a vibrating shelf or the like.
Speakers are supposed to be kept still so its common to see them use pointy feet.