I created a question on Stack Overflow about the best C++ pre-processor Macros to go with the other pre-existing question about the worst ones. I made the mistake of including some nifty examples in the question which--even if they weren't controversial--wasn't a good idea anyway. They should have been in an answer and probably a little time after the question was asked. The question was closed before anyone could give an answer. Most comments on the question were on the macro examples I had given but there were a few supportive ones of the idea of the thread (if not of the usefulness of my examples).
I can't find the thread anymore. Was it deleted? If so may I retry?
There's little point, it is very likely that it will just get closed again. This time probably with a flurry of downvotes from ticked-off users. Review the FAQ for the kind of questions you should not ask. Yours seems to match the first three bullets:
I don't know if it was deleted, since I'm not a 10k user, but I humbly submit that you may not retry. "List of X" questions like "what's the worst C++ preprocessor" were wildly popular when SO started. Then they landed in sort of a gray area during 2010 with half the community loving them and half hating them. Today the policy is pretty solidly "questions like this are off-topic, but we're not going to actively hunt down and delete old ones."
The "pre-existing questions" exist for historical reasons; new subjective questions are no longer allowed.