I'm still using my 2011 iMac at home. Nice machine with the integrated DVD player. Every five years is about my desktop upgrade cycle. I'm going to hold off until end of year to see if I can get these better GPUs.
I ripped the DVD player out of mine the day it arrive - my 2011 iMac was running 2x SSD's configured as raid 0 - I had almost 1000MB/s read and write in an iMac about 5 years before it was the norm
Now doing equally fun things with a Skylake iMac and Thunderbolt 2 enclosures. I hate the waste space with optical drives and media.