main element was a late addition to HTML 5.0, so late we didn’t even make mention of it in the EPUB Best Practices guide as it had gone to print by the time the element got accepted. The omission left me wondering if there are any cases in ebooks where including the element in publishing contexts would make sense, and I’m still drawing a blank.
Nothing about it seems pertinent to publishing, but it feels weird to say there’s an HTML element to avoid in ebooks. I’m going to see if I can talk my way into some use for it in this post, but I’m not feeling too hopeful right now. If nothing else, you’ll see clear evidence I rarely think my posts through before writing them.