This type of construction is not that uncommon mixing condos and rental units/hotel rooms in the same building, where the condo owners use separate entrances and have their own elevators and amenities. See the Trump tower in Chicago for instance.
Most of the units will be multi-million dollar condos probably on the higher floors with views. There will also be a few floors of rent controlled apartments. The reason you keep things separate in these cases is the condo association. In a condo building each owner has financial responsibility for the upkeep of the public spaces and amenities such as a concierge, gym, pool etc. If you intersperse rental units among owned units then who gets to vote to increase or decrease services and who pays the HOA fees? I bet HOA fees in a multi-million dollar Manhattan condo building are substantially more than $1k a month.
Most of the units will be multi-million dollar condos probably on the higher floors with views. There will also be a few floors of rent controlled apartments. The reason you keep things separate in these cases is the condo association. In a condo building each owner has financial responsibility for the upkeep of the public spaces and amenities such as a concierge, gym, pool etc. If you intersperse rental units among owned units then who gets to vote to increase or decrease services and who pays the HOA fees? I bet HOA fees in a multi-million dollar Manhattan condo building are substantially more than $1k a month.