In the reference implementation, your conversion function isn't
explicit, so you're actually proposing an implicit conversion from
std::any to any type. Is that intentional?

Fwiw, I find it a bit annoying that we need std::any_cast,
std::static_pointer_cast etc., but I'm sure there are good design
reasons for why we have these function templates. Perhaps one of the
reasons is that the syntax "T(my_any)" uses explicit conversions,
unlike "T t(my_any)".

Anyhow, "Improve readability" and "Simplified usage" are relatively
subjective benefits, and any proposal needs to make C++ strictly
better. You would also need to look at the costs/downsides of not
using std::any_cast and demonstrate that the status quo is bad and
your proposal is not just better, but so much better that it's worth
committee time.