I think sliced bread is overrated as fuck. It used to be nice back when people couldn't just buy knives for cheap, but nowadays it just means getting stale bread faster.
i got a like 30 year old electric bread slicer, never sharpened the blade, still cuts like brand new, sometimes the crust gets stuck when its a super fresh super crispy crusted bread, but its amazing.
I recommend a very nice bread knife! I have a mediocre bread knife that was like 15USD like 15 years ago and it still saws solid slices of soft bread without schmushing the bread!
I'm mostly just commenting on why it was such a big deal in the time that it happened rather than today. Today, we do have more machines, easier access to knives, and generally less domestic work to do than was the case in this era. I do own a breadknife, though I rarely eat bread and it's mostly denser loaves when I do (a kind of sandwich bread the wife prefers or something like Baurenbrot for my tastes).
You can get a wide variety of both sliced and unsliced loaves in pretty much every supermarket in my area. The ultra-processed american type bread is something else entirely and it's also a bad idea too, like pretty much all ultra-processed foods. Can that stuff even get stale? I remember it staying exactly the same up until it grows mold.