Having shared a house with my mom as she got old (we had to have grab bars installed even for the one little stair from the garage to the house), after I retired I was careful to buy a condo in a building with elevators and zero stairs (though I'm only 1 floor up in the high-rise so I frequently use the stairwell to go up or down the one flight to an exit door).
Although I think stairs are good exercise for an old person's legs, I don't think they are the safest 'exercise equipment'. It was before I moved here but my neighbor saw me coming up the one flight holding bags in each hand (no hand for the rail) and she told me someone in our hallway had fallen on those stairs and even though the fall didn't kill her, she died soon after. Since hearing that I've been careful to take the elevator when I need both hands to carry stuff.
Although I think stairs are good exercise for an old person's legs, I don't think they are the safest 'exercise equipment'. It was before I moved here but my neighbor saw me coming up the one flight holding bags in each hand (no hand for the rail) and she told me someone in our hallway had fallen on those stairs and even though the fall didn't kill her, she died soon after. Since hearing that I've been careful to take the elevator when I need both hands to carry stuff.