Well not just medical tech: I would argue that other fantastic tech has revolutionised the world in the last 50 years.
To answer your question, on the medical advances in the last 50 years include the invention of or enhancement of:
-MRI scans -Vaccines such as mRNA and Covid-19 -Gene-editing techniques -surgical robotics And more
Thank you :)
You’re right, that technology does affect relatively few people, but even one life saved is still a life saved