I can only offer personal experience and views, others will differ.
Modern car paint processes are pretty good generally. I recently parted with a 21yr old Yaris in silver which apart from actual scratches here and there and a few chips on the leading surfaces from grit etc, the paint was in excellent condition, the clear coat had not deteriorated at all. (think back to the Ford Silver Fox paint of the 1970's which actually peeled off in sheets
).
I don't particularly pamper the cars (well. one I do but that's different). It got washed a few times a year, maybe half a dozen, with Autoglym Shampoo which helps maintain a protective layer. Once a year it got a treat with Autoglym Resin Polish (wax), usually in autumn to give it a bit of boost for winter.
As others suggest, just make sure to clean off any poop etc promptly.
Dealers offer these treatments as add-on cash boosters, and fair enough if it fulfills your wishes, I wouldn't say don't, it's up to you, but I can't help feeling it's rather unnecessary expense. If the car is worth spending that sort of cash then you'll be looking after it anyway, so regular(ish) washing with a decent shampoo product will probably offer all the maintenance it really needs.