My BP was a production machine....and anvil.....for a filter factory for a long time. The quill might have a few tenths of movement, not enough to be concerned about. The polished chrome spindles are fitted to honed castings at the factory. They are a *perfect* fit right off the assembly line. And stay that way for many many years, because the wear coefficient of grey cast iron and the polished chrome is very low. Plus the cast iron is a great bearing material, it's really nothing to be worried about on a BP.
Now, if your RF (like my drill press) has a steel spindle in a cast iron casting, it will wear over time. My drill press has a setscrew that fits in a channel on the quill to adjust for wear by pushing the quill to the side farther when it wears out. Crude, but it's more than adequate for a drill press. I don't believe your RF has an adjustment though.