From a business point of view I think the Mac mini hasn't changed as the demand is good enough to maintain the 2014 model but is not potentially great enough justify an updated redesign. Prices of 2014 parts have dropped down so much that margins has improved over time. In the past Apple did something similar to this with a 13-inch non-Retina legacy MacBook Pro that they sold from 2012-2016. Bhphotovideo has the $499 Mac mini for $399. This proves that Apple has a more than 20% margin if you buy it direct from Apple.com. I would hazard a guess that they're making as much as 50% margin on it if bought from Apple.com at $499. At $399 makes the 2014 Mac mini Core i5 (4th Gen) very competitive vs SFF PCs (Small Form Factor) & NUCs (Next Unit of Computing) priced below $276. Although at that price you would need to add an OS, 500GB 5400RPM spindle drive and 4GB of RAM making it hit $399 like the Mac mini. Those who bought the Mac mini when it first came out in 2014 for $499 & at Bhphotovideo when it was offered at $399 are the luckiest as the hardware wasn't that old for the price point. I would hope Apple decides to reprice the 2014 Mac mini to say $299 before 2019 to keep it relevant. Unless they change their minds and update it to 2018 hardware. Remember, the Mac mini was marketed as the device for switchers to try a Mac.