I still believe that the PS4 outsold the Xbox and I believe that it sold closer to the Switch than has been speculated so far. I do not believe that the switch sold more than PS4+Xbox combined. I think Benji has a pulse on sales but I don't think he has the entire picture. Also, if holiday sales were down at gamestop per Benji's post at 6.1%
This indicates that HW for December of 2018 may infact be less than hardware for December 2017. There is simply no way that the Switch could be past 2 million.
And if it did, and HW was around the same 4.5 million sales, there would be more sales coming from ps4 and xbox one combined. 3DS has tanked YoY.