Not sure if being old is the reason getting 4 stars. In fact, The Broadmoor in Colorado Spring is very old but is still getting Forbes/Mobil 5 stars. If the 2021 rate is based on 2020's evaluation then crowd lobby is pretty much everywhere in Japan as Japanese government offered Go to Travel Campaign - I saw many people complained about Ritz Tokyo's services, though it still keeps the 5 stars.

Obviously, Marriott wants A LOT more elite members, so they were pretty much giving free Plat status having a credit card. It will be Platinum zoos everywhere in 2021-2022....