Esperanto may be a saner language than English in every way.
But English is the language of Shakespeare, of Milton, of Byron, of Dylan Thomas; the language of Arthur Conan-Doyle and Agatha Christie; the language of Tolkien and C S Lewis; of Lewis Carroll and Beatrix Potter. It’s the language of Stoker and Shelley.
Wikipedia notes that over 100 original novels have been published in Esperanto. Big woop-dee-doo(!)
I want to be able to use Perl 6 day to day, but not if that involves missing out on Perl 5’s literature (i.e. CPAN).