It might seem obvious if you don't think about it much, but one is a pragmatic breakdown from experience and one just says "adding cpus won't work forever if there is some part where you can't add more cpus".
One is basically 1 + 1 = 2 and the other is a warning of a non obvious situation that comes from lots of experience and effort.
One is basically 1 + 1 = 2 and the other is a warning of a non obvious situation that comes from lots of experience and effort.