Without some context, it is a model that has been replaced by a newer model.I dont know what is a superseded cpu.
meaning it's just old, but it doesn't mean it'll break or needs replacementWithout some context, it is a model that has been replaced by a newer model.
Where did you see this phrase?
Generally correct. There could have been an error (lookup the Intel floating point error) that the manufacture had to fix. There would be a revision of the hardware. That is one possible reason for a CPU being superceded. Most of the time the term just referrs to old.meaning it's just old, but it doesn't mean it'll break or needs replacement