My take on this is that the BO/VG vehicles are simply dwarfed by SpaceX/F9 in terms of both physical size [1] (source [2]) and launch profile [3] (source [4]).
It's partially that it's more routine now, but it's more that the F9 is so much larger, has a far more complicated launch trajectory, and in my opinion that they are landing on barges in the middle of the ocean.
