I know it's bad practice to have extended discussions in the comments section, and I understand why. But there is no way to move the discussion to chat with a low-reputation user, and in my experience low reputation users are the most common to have extended discussions with, because they often have a lot of questions and often ask for more explanation of things.
How do I handle a situation where a low rep user has a lot of questions about an answer, but their reputation is too low to move to chat?