Fanboys come from all genres. It's a social defect which results in derision of anything that isn't within their spectrum of interest.
Star Wars vs. Star Trek;
Tea vs. Coffee;
Teacher vs. Pupil;
Manchester United vs. Manchester City;
BMW vs. Mercedes vs. Audi;
Trump vs. Clinton; and of course,
Men vs. Women
In the PC world this phenomenon has far less to do with fear of switching brands (as some have asserted) than other aspects of human desires. These include product familiarity and price range. If something isn't broken, why fix it? And if it isn't broken AND cheap, why fix it at a premium?
Truth be told there is nothing wrong with any of these brands. They all have their positive characteristics. Whereas Intel does indeed have the advantage in performance, AMD has undercut Intel in pricing. This, however, did not work and a new platform is required to regain market share. AMD chips don't seem to have the "well rounded" capabilities that Intel chips have. Some people don't need Intel's power and settle for a reasonably priced yet capable product.
The race between AMD and Nvidia I find to be closer than people like to admit. Currently, AMD has no answer to Nvidia's high end product, but that will hopefully end soon with the release of Vega. I believe they will at least match 1070/1080/Titan X(P) performance, and possibly exceed it. Whilst undercutting Nvidia in pricing once again, forcing them in turn to lower prices. Healthy competition means better savings for consumers.
Zen vs. Kaby Lake/Cannonlake through Tigerlake I believe will not play out well for AMD. I think Intel has the upper hand here, and will maintain it. I mean, they always seem to compete with themselves. Skylake, now Kaby Lake followed by Cannonlake in quick succession with more already on the horizon. AMD provided no answer to any of these chip releases. Zen is the first AMD marketed chip to garner significant hype since Athlon X64.
I used all of the products this thread is discussing and enjoyed them all. No problems and performance was well within what I needed. But now it has changed a little. I am no fanboy, I simply state facts. Intel is ahead of AMD, and Nvidia is ahead of AMD. Can AMD match performance? Yes. But remember to check the TDP and temperature of your AMD hardware when comparing similar performance of their competition. AMD's run hotter and swallow more electricity. Once the performance gap is on par I will once again consider AMD. Until then the price gap they provide is negated by wattage used to run their hardware. Is it a lot? No. But over time it adds up. So might as well go for the performance of Intel and Nvidia. Just seems logical.