Commissario
Since I got my iMacs back in 2011, I've never installed an OS fresh, I've always done an upgrade. This time I'm noticing that they both seem a little sluggish so I'm considering doing a nuke and pave to see if things improve. My main machine is an i7 with whatever the top speed CPU was at the time with 16Gb RAM and an SSD. I'd not expect it to be sluggish at all.