DSLRs were the cameras that many professionals used back in the day, but then mirrorless cameras came along and the game was changed. This is because mirrorless cameras are smaller and lighter than DSLRs, making them more ideal to be carried around, plus with some of them sporting full-frame capabilities, some pros have actually replaced their DSLRs with mirrorless cameras.
This is why it doesn’t come as a surprise to learn that maybe Nikon could be considering something similar as well. According to a report from Nikon Rumors, they have heard that there might be some Nikon DSLR models that will not be replaced with newer DSLR models. Instead, they believe that these models could actually be replaced by mirrorless cameras. This includes the Nikon D3500, the D5600, and the D500.