Granny always had Pears -which was see-through! How exciting was that! But they have reformulated it.
Coal tar soap has also been reformulated, because actual cosl tar is a carcinogen.
I'm currently on soap nicked from a hotel room,but I like Faith in Nature soaps. I don't often buy soap, because I often get given it at Christmas. There's still an assorted stash in the cupboard.
When I was little, Mum used to save all the soap ends, then about once a year, they got boiled up together in an old biscuit tin on the Rayburn, and the resulting greenish stuff put into handful-sized balls and left to dry. This was used in the sink by the door for really filthy hands that had been gardening or farming, so didn't contaminate the nice soap in the bathroom.
When I was a bit older, we inherited some Lifebuoy soap that got used instead, and when that was all used, then she bought a green soap for that sink. I do not miss the days of boiling up old soap. The smell was distinctive... other soap smells are very evocative of particular times/people, but usually in a more positive way.
Soap dishes don't get mouldy if you clean them