I thought it would be helpful to have some of the extreme power users explain some of the finer points of TeX in some more expository questions. Something like Andrew's nice question "When to use
\expandafter?". The top-voted accepted answer there is very helpful, despite the final statement of the answerer that it's often better to learn this kind of thing through examples.
Questions like "When should I use
\futurelet?" could be met with, "You'll know when you need to," but that might make the questioner feel like they have to wait for a higher state of enlightenment before they deserve an answer. Would a question such as "What is a good real-word example of
\futurelet?" be appropriate?