Chairlifts are a good choice for people who meet all of the following criteria:
Have difficulty with stairs
Are not getting weaker
Are not in a wheelchair
For people in wheelchairs, transferring from the wheelchair to the chairlift seat can be cumbersome and potentially dangerous. That chair is right at the top of the stairs. One slip could lead to a bad accident.
For people who need wheelchairs a chairlift now requires two wheelchairs - one for the upstairs and one for the downstairs.
For people losing their strength a chairlift is a less expensive choice only in the short term. Why waste the money on a chairlift if there is a reasonable chance of needing a wheelchair lift?
In Public Buildings chairlifts are not a code-compliant accessibility solution.