system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do I never hear anything else about 99% of newfound scientific research?

I always see articles from credible news sources that say something along the lines of "researchers discover way of detecting cancer that is 20x cheaper" or "kid discovers HIV screening kit for $5." While they are good news and all, I just never see anything else about them. If they were so groundbreaking, wouldn't we see more about them? They seem important...
gpt
The articles are hyperbolic. Discoveries are almost never as amazing as they are presented, or they are only that amazing in very specific circumstances which aren't that practical in real life.

Of course, even when one of these studies really is amazing, there are other issues. They require *tons* of testing, to not only confirm that they are accurate, but that they are safe. A $5 HIV screening kit is less impressive if it gives you diabetes or something. 

And then of course there's simple price. Even if a new discovery is groundbreaking, and it's been confirmed by the scientific community, it still might be too expensive for it to be mass produced. It could be decades before they figure out how to fabricate enough of the product for it to actually show up in the mass market.