The future is looking bright in terms on 'coatings'
There are the mentioned self healing ones being worked on.
I have been using a Rubber based coating that differ from Glass Coatings mainly in terms of water spot resistance. I get none or at least they clean off very easily.
There are supposed other rubber based coatings coming soon but that's just what i've heard.
What really intrigues me is - an artificial clear coat that is machined on, mainly to address soft thin clear coat paint basically saving the paint below. This clear can then be coated over the top of.
KAMIKAZE ARTIFICIAL CLEAR COAT - YouTube
What else, other glass based carnauba waxes and more spray on hose off types.
And there are still 'permanent' coatings out there that work as advertised. Not just Opt.