Collisster,
A good cable/plate loaded row machine isn't a bad thing as it isolates the right parts of your back by supporting the chest. Sometimes the problem with BORs is that there is a lot of body movement involved. Having said that BORs/single arm dumbbell rows are great exercises and don't have a fixed ROM.
So the answer is yes and/or no
I like to have both on a back day personally.
A good cable/plate loaded row machine isn't a bad thing as it isolates the right parts of your back by supporting the chest. Sometimes the problem with BORs is that there is a lot of body movement involved. Having said that BORs/single arm dumbbell rows are great exercises and don't have a fixed ROM.
So the answer is yes and/or no

I like to have both on a back day personally.