I've recently had my car detailed with Concours Nova DC. It's a silica and diamond infused coating that is supposed to last up to 5 years. Every 6 months or so you wipe over with a layer of Concours Nova Jet to keep the shine and hydrophobic properties.
I did a search here and was supriseed to not find any talk about this product.
It seems to do away with the need to polish and wax every few months or even every year.
I'm very happy with the look of my car. Obviously it had to be cleaned, clayed and polished before applying Nova DC. But my ongoing maintenance for the next 3 to 5 years will be minimal provided I wash with ph neutral carwash with grit guards in the bucket and spray a bit of Nova Jet onto it.
https://www.waxit.com.au/products/concours-nova-dc-30ml