Are all luxury ships all inclusive?
Oceania's newer ships are gorgeous -- nicer in some ways than their sister ships on Regent -- but, the cabins are smaller -- they even have inside cabins -- something luxury ships do not have. Most importantly, they are not all-inclusive so you are still signing for things.
Until recently Crystal was not all inclusive but was considered Luxury
If you required more space on Oceania choose a PH @ 482SF or OS at 2000SF
For some of us we are quite happy in the cheap seats & signing chits for what we drink than paying upfront for other people's drinks & excursions (we do private tours)
Luxury can mean many things to many people
It can be the surroundings, it can be the service you receive, it can be all inclusive or not it can be just the overall experience that make you feel like you are on a luxury line
It is a personal experience