Should we stop pretending that multiple renditions are an actual part of EPUB as implemented in reading systems in 2020?

1. I'm aware of no implementations in widely-used reading systems.

2. The very concept adds confusion to the spec. We constantly use phrases like "Each Package represents one Rendition of an EPUB Publication."

3. I fear that multiple renditions support a "separate but equal" model of accessibility.

4. Multiple renditions add a massive amount of complexity to EPUB. Rendition selection as well as rendition mapping are not simple ideas.

5. Standard web practice has moved away from using different documents for different users (remember mobile versions of websites)? Semantic HTML and media queries can meet most use cases for customization.

6. Business support is minimal. Even if we like to theorize about bundling English, French, and Japanese versions of Moby-Dick in a single EPUB, that's generally not how content is created, distributed, and sold.

I would propose we remove mentions of multiple renditions from the core EPUB specs. This would not affect existing documents, because reading systems were only ever obligated to present the default rendition.