It seems like Tesla is adding CCS ports, at least to their European chargers.[0] There are also adapters to go the other way.[1] I am sure at some point Tesla might just switch over to CCS unless there is something better about the Tesla connection. I don't really know enough about this to comment on the benefits of either.
[0] https://electrek.co/2018/11/14/tesla-model-3-ccs-2-plug-euro... [1]https://www.tesla.com/sites/default/files/CCS/CCS_Combo_2_Ad...