I also grew up in a house with an outside, very draughty toilet, and no bathroom. We were bathed in the tin bath in front of the fire, as children, and washed at the kitchen sink as adults.
My present home (54 years residence) has a small bathroom. We never used the bath, in recent years. Just the over-bath shower. When my husband became ill we managed to fit a small downstairs toilet into the kitchen extension/utility room. I have been SO glad of it since I had my hip replacement 3 months ago, and also the walk-in shower which I finally managed to afford last year, after having the bath removed.
One bathroom, and the downstairs loo, is more than enough for me to clean. I couldn't be doing with all these ensuites etc.