I agree, they seem to have pocketed the money leaving the stock cooler out from the skylake k series. Dropped the cooler AND raised prices, clever. It's not that the stock coolers aren't enough for stock speeds, just the wonky plastic pushpins I hate. It's like car jacks, they stopped using old wonky bumper jacks a long time ago in favor of updated methods which do the same job easier, safer and more effectively. We also don't have to get out and hand crank start our cars anymore.
Far as I can tell there are two types of thoughts shared by the majority of people regarding intel's persistent retention method for their coolers. They either tolerate it or hate it. No one says 'wow, great idea - that made life easier'. Ignoring the fact that the stock coolers can get a bit noisy under extended periods of heavy load, the retention system has a way of fouling up. Most work 'ok' but the plastic pins are constantly under tension and rely on the resilience of the plastic which weakens over time. Sometimes they don't lock tight, sometimes they break and let loose leaving only 3 of 4 holding the cooler down.
Almost every other aftermarket cooler, whether cheapo or high end, uses nuts and screws to hold down their coolers. It's not by accident. With as many complaints as intel's had about the dreaded plastic pins you'd think they might have addressed it over the past 10yrs of using the same defunct design. I've used the stock coolers in the past and they've done an ok job for stock cpu's as well. The time around when building a family member a pc I didn't even think twice about skipping the stock cooler. Same for my workstation build, which never gets gamed on or anything. It wasn't just for better than stock cooling, the $25 for a cooler was worth not dinking with that pushpin garbage. Not to me anyway. I'm by no means 'rich' but I'm also at a point in my life where skimping to save a few bucks isn't worth the additional headache either. If there's a better mousetrap for a couple dollars more, sounds good to me.