This question was closed as a duplicate while discussions as to the best answer were ongoing, and while useful information was coming out. Where should we go to continue discussion on questions that have been closed? Should we copy all the comments and answers to the duplicate question?
The question was closed so not to spread the answers between multiple threads. If you raised some new set of issues in comments as part of a side discussion, you can certainly ask about those issues as another meta post.
Your question exemplifies why we ask users not to carry on extended discussions in comments. You're going against the grain in trying to figure out how to continue your other discussions. Stack Exchange is designed specifically to make discussions difficult.
After someone asks a question, members of the community propose answers. Others vote on those answers, and the answers with the most votes rise to the top. That's the entire purpose of Stack Exchange; You don’t have to read through a lot of discussion to find the information you need. If you start posting useful information throughout the comments in a threaded pseudo-discussion, the entire purpose of Stack Exchange becomes moot. 'Might as well go join any one of the thousands of phpBB forums on the subject.
You can continue to comment on closed questions. It simply prevents new answers. If you want to continue the discussions there, feel free.
If you're not getting quite the immediate gratification you're looking for, you might try chat. It's a better place for discussions.