It is now the middle of 2018 - three years after the manufacture date of my mid-2015 MBP. 'Coincidently' the MBP has suddenly begun to decrease in speed and power in the recent weeks. It's also funny that Apple provides a three year AppleCare plan. I wouldn't put it past Apple to apply the same planned obsolescence tactics to their Macs as they do with their phones. Does anyone here have experience on this subject? If Apple does slow down older MBPs, do you think a battery replacement would fix the issue? I heard that iPhone software updates checked the battery model to determine the age - and therefore speed - of the phone. Looking forward to hearing you thoughts!