Pre-War vs. New Construction Amenities

Would anyone be willing to offer their views on what characteristics or improvements would make an existing prewar competitive with newer luxury product? I have heard discussions of the value of certain amenities such as: exercise facilities entertainment areas such as media rooms swimming pools roof decks with bbq and dining setups insulated windows thru-wall HVAC upgraded electric service concierge services bike rooms storage rooms washer-dryer closets extra bedrooms/sleeping areas I am looking at a building that is considering a number of upgrades that will require an increase in monthly maintenance fees. Any opinions on which amenities a buyer should value most and be willing to pay for down the road?