I work with developer. that is my opinion.

Yes, that is also another factor to be taken into consideration. Units facing the morning sun would be much better than those in the direction of the setting sun.

It depends on density and how high the property is.

It is seldom to see a condo or apartment that not very tall or low to medium density being served by 6 lifts.

Most condo/apartment won't have more than 30, and with medium density layout, 3-4 lifts generally are enough.

Yes there will be 46 levels for my apartment which being served by 6 lifts 😁

Than I would say that is pretty adequate as long as the management maintains them on a regular basis to ensure all 6 are functioning most of the time 👍👌

It should be adequate unless you are having more than 12-15 unit per floor.

As said, a good management is the key, you can have 10 lifts but not properly maintained and 2-3 working, then how many lifts also no use.