To some folks this may not seem like much of a benefit, but these improvements add up over time. I could only find this example, but in the last 40 years, the 5-year survival rate for breast cancer patients has gone from ~75% to 92%. All of that benefit was recognized at once, but rather incremental benefits added up over time.

I wish I could have the table I saw for colorectal cancer. Really amazing. We're talking average overall survival going from 6 months to 5 years in the span of a few decades. This isn't the one I was thinking of, but it's a great example.[1]

[1]https://www.bowelcanceraustralia.org/images/Bowel_Cancer_Aus...