I’ve stumbled across something similar. It was a personal portfolio / bio site. The owner wrote several versions of each section, using different styles and level of detail. The various versions were selected by the reader with some sliders or something.
I thought it was pretty neat. A huge pile of work to write all that, but neat.
It's interesting if you consider the time spent writing versus time spent reading. This post will take me less than a minute to write, you less than a minute to read, but perhaps five/ten people will read it - a 1:10 ratio.
Popular content will have a much larger ratio - if I am a popular writer I might spend a day or two on a fancy blog post like described above, but if 60,000 people spend 10 minutes reading it that's 600,000 minutes - 10,000 hours! Now spending a bit more time to make it more useful/enjoyable/readable seems worth it.
Sounds like a job for GPT-3. The author writes the long form version of each section and then GPT writes the simpler versions.
Something like this? https://quillbot.com/summarize
The web interface was similar to a medium blog post, but the amount of work for both the writer and the reader was more than I think most folks are willing to invest.