The Lithium option was added in 2021 as far as I know. It was optional until the 2025 model year. Yes, on the R-25 and R-27 you can run the A/C with the inverter, but on the larger models with two or more reverse cycle A/C units, you can’t run all of them on the inverter typically. I don’t think you can really easily add the full “Luxury Edition” package to a boat that doesn’t have it. You’d have to add lithium batteries, the reverse cycle A/C, plumb it all, etc. There may not even be the right through hull fittings unless the boat was originally a Luxury Edition boat.
The electric grill is in the cockpit on the R-25 and R-27, so you can keep the bacon smell outdoors.
IMHO, the cockpit view from the captain’s seat is really good on the R-25 and R-27 outboards. If you get the auto pilot, you can, kind of, drive it from the cockpit while running downriggers or planers. You can’t control the throttle that way though, at least not on the boats without the electronic controls on the 2025 and up models. I don’t know if those would add that feature.