As long as Federer is alive and kicking and still in the slam race, it is not wise to write off the big three. Sure Nadal and Djokovic are the top two guys, but back in 2015 Nadal was absent from the top, people still called it the big three, Djokovic was absent from 2017, people still called it the big three. This is a three way slam race, you cannot have a three way slam race without three contenders....so no, we shouldn't. Haters can, but reality is, Djokovic and Nadal are still seeing Federer as clear and present danger, so it is big three all the way.