Mainstream overclocking is all about whatever you can achieve above base frequency using mainstream cooling solutions, ie. air and water. It is not whatever you can get on top of turbo boosting:I'm well aware that Intel can reach higher clocks than AMD, I've never argued that. My point (and it seems that Mark's as well) was that unlike previous gens, 10XXX series doesn't really have any overclocking room left and is quite similar to Latest Ryzen in that regard (which is good, no perf left on the table).
Base clock + 1400Mhz = 5,000MHz for the 9900k below is a 38% overclock, and some even go higher. (See screenshot below).
Usually, the pro-AMD members like you argue that MCE is not an Intel feature (and are turned off in reviews), and is in fact, overclocking. So, isn't this akin to eating your cake and wanting to have it too? A 125w 10900k runs around 3.9-4.1GHz in heavy, all core scenarios depending on code. They can be overclocked 1GHz+ on top of that by mainstream gamers and overclockers.