Curious to see what the threshold of many people are for upgrading now is versus back then. I've only been interested in computer related stuff since about 2013 so I've only ever known 5-10% increases each generation MAX (at least for Intel). I think that many of the people that have grown up with that kind of progress have a lower threshold to consider upgrading while many that remember or experienced more rapid performance progression from earlier times might want to wait for more significant gains before upgrading.If you are still happy with the value you are getting from your i7-2600k, then it means that what is on the market today still isn't good enough for you to bother with an upgrade,. That's the essence of what I find disappointing about the 3k series. Yes, it is better, but still not so much so for the price that I can be bothered to upgrade my i5-3470 yet.
Until about ten years ago, keeping the same PC for 5+ years was nearly unthinkable for most people including myself with most people upgrading every 2-3 years, today it is a matter of course for a growing number of people as good 5+ years old PCs (something like i5-2400 and up) are still adequate for the vast majority of everyday tasks and most casual to somewhat competitive gaming.