B M
I'm looking at the wealth of experience from the professionals who have contributed to your request. Being a member of this forum and their industry. I wish to only say this. You have been given advice from a collective by my estimate of 200 years of experience. These professionals span
from the Americas to Australia. Some Otis and some ex-Otis. All I'm sure have worked on Otis as well as a variety of manufactured equipment.
They all seem to agree on your elevators should be modernized.
Best of luck,
