Well after the beginning of the age of home electrification, but I’m not sure precisely. I’m renting my current house.
I don’t think any of my stairs have had such an exaggerated ledge of the tread like the picture in this thread. In my previous house (owned, built in 2000 something) it just had a little bump nailed on to the edge, but it was symmetric on both the tread and riser.
Hmm. Does that “nose” count if the riser is slanted? Maybe I’m just not seeing what I’m expecting, but there is space because the riser isn’t perfectly vertical, now that I’m looking.