Excellent question. Teslas are very unique with their paint. We're also seeing the same thing with Porsche. Most our business has been Porsche for decades, and now we're into Teslas. So, for some reason, both these makes have very soft paint and it's only in the past few years.
So, knowing that, and also knowing that XPEL Ultimate and Suntek Topcoat are so clear, I think you should wrap the most important areas and just do a proper care for the areas not wrapped. So for us, our typical install is full hood, full fenders, bumper, mirrors, and headlights. I'm not a huge fan of partial installs because in a short period of time, maybe a year or two, you'll be replacing the film because the edges will be exposed to being rubbed by towels, getting wax buildup, etc. So, spending a bit more and getting wrapped edges is truly worth it because it'll be a semi-permanent install.
As for coatings, yes. Apply it to wherever you don't have film. Your paint needs all the help it can get. We're currently using nano technology because I feel they provide better protection and the durability is better than non-nano products.
I don't want to have a client feel he/she has to wrap the entire car to be safe. It's nice to not have to worry about chips, swirls, improper washing, if the entire car is wrapped, but it's not mandatory. Just the front end which gets the brunt of the impact and coat the rest. The most important task though is doing a proper wash routine. Using all-natural lambswool mitts, rinsing mitt and areas washed routinely, all help. Drying with high quality microfiber towels is a huge plus too.