They really won't be more upgradable. Kaby Lake is the last generation of processors using the LGA1151 socket, so if you want to upgrade you'll need a new motherboard too. AMD's AM4 socket is going to have new processors for it until at least 2020, so that has more futureproofing. Ryzen also has more cores for less and single-core performance is only about 5-10% worse than a comparative Intel. Intel processors use a very cheap material to transfer heat from the processor to the lid, while AMD directly solders it to the lid of the processor, making the processor run cooler. Ryzen chips can't really overclock past 4.0GHz, which is the main disadvantage of them.