I like to build my own computers -- but I'm not a gamer, just someone who appreciates having the power to get work done quickly. Skylake may be long in the tooth, but it's still very viable for those who don't need the absolute latest-and-greatest/
If you look at this machine as a high-end business computer, it makes a lot of sense. It could be a fine workstation (and the starting point for a much better system) for a professional photographer, a Youtuber, video editor, etc. It would also be great for CPAs, bookkeepers and others who just need to crunch numbers. Such users generally value their time too highly to build their own business computers, so at the current price it would be a bargain for them. As a bonus, after work it can entertain as a "good enough" game computer.