Can we please have in-post spoiler tag functionality at some point?

Besides allowing people to discuss the results of, say, Worlds without ruining the game for people who haven't seen it yet, it's also good for balance posts because it allows them to appear shorter and less imposing.

I know that I like to build up a lot of context for my main points, but not all of that is necessarily needed to respond to my idea. If I can spoiler tag the context and development of my idea, the people who are interested in context can read it while the people who are just passing through can get the main idea quickly without having to read through the entire development of the idea to get there.