Rotating mechanical disks are dead. Why would anyone want to use such a format when we can be using smaller and non-rotational multiple-write devices like Flash

Rotating mechanical disks are dead. Why would anyone want to use such a format when we can be using smaller and non-rotational multiple-write devices like Flash Memory on USB sticks or SD-Cards? Discs of all types are dead. They will be replaced by non-moving part memory sticks.