Well it's not unheard of that some people won the genetic lottery and are more efficient at it, functioning normally with only 3, 4 hours of sleep every day. There's definitely room for improvement for those of us that need 8 or 9 lmao. Hell even reducing it to just 7 or 6 would be such a massive gain.

For "Short Sleeper Syndrome", it remains to be seen what the long-term tradeoffs are.

Kind of like how someone might excel at a specific test because of a lesser sense of pain, but that lack of feedback loop can be detrimental in the long run as they keep injury themselves without noticing.