Benchmarks suggest Apple doesn't slow down old iPhones with each new iOS release, but users still complain of lag
Did you imagine buying a 4K TV for less than $400 a few years ago? This TCL unit has very positive user reviews, it's 55" HDR10-capable and its smart TV portion is powered by Roku. Demand is high, but you can still buy if you're willing to wait for it to ship.
For $180 the Core i3-8350K is nearly a rebadged Core i5-7600K: both are 14nm quad-cores operating at ~4GHz, but the 8350K is 25% cheaper. Meanwhile, the Core i3-8100 goes for a more appealing $120. And although it's locked at 3.6GHz, it's roughly 40% more affordable than a comparable i5 from the last generation.
BTX, Ultra ATX, EATX, XL-ATX, HPTX?