@ProjectEnd is out with some thoughts on this proposal. As usual, he's completely on-the-fence in his opinions, and your just not clear on what his take is........LOL
Seriously, PE is raising great points; I'd go a bit further........
Lets talk about potentially serious problems.
1) Evacuation in the event of a fire. 94 floors is along way down even for someone able-bodied, never mind the problem of someone in a wheelchair or the like. There's also a time elapsed question. If smoke is filling a building, how many minutes of breathing that in can one sustain? PS, the time model for an older adult using stairs is typically 1.3 seconds per step. Assuming 22 (or more) steps between floors, depending on ceiling height, that's 32 seconds per floor. At 94 floors, that's over 45 minutes to exit the building.
2) Evacuation/need to exit can be an issue for just routine life in the event of an elevator failure or power failure. Are we considering exactly what back-up power needs to be able to support?
3) We've seen examples of people who literally couldn't access their units by elevator for weeks. Sufficient redudency to each floor is crucial.
4) A few buildings have now made clear the problems of water supply to upper floors, both in the mainline risers and in fire suppression systems. Pumps are required, and pumps can and do fail. Not only do we need to reduce the risk of failure and ensure backup power for these; we also need to talk redundancy.
5) Even with firefighter operation of an elevator, we need to talk response time impacts over such long distances (same with EMS and Police).
That's without getting into myriad other details; and the complexity of future maintenance for condo boards as well. Many have performed poorly on much smaller buildings and simpler buildings, this becomes an even greater concern with a building such as this.