It's worth also considering demographics. If you narrow the focus to just younger generations (who, we can guess, are more addicted to smartphones) then the numbers look pretty bad. E.g.:
https://www.theguardian.com/books/2024/nov/05/report-fall-in...
2. Don't confuse "enjoyment" with "number of readers". The previous generation may have enjoyed it more - because there were no better options.
3. People over the globe are more educated now, and engaged in knowledge work. They must read to get work done.
4. Don't forget the "pirate book" scene - such as lib gen, Anna's archive, etc. - in developing countries.
Personally, I don't count pornhub traffic the same way I count Youtube or Netflix traffic and I think the same applies here.