Hmm, I could mention quite a few recent works like Kim Stanley Robinson's Mars trilogy that are hard sci-fi.
Yeah or Stephen Baxter, damn that guy is good. Such books exist, they're just far less numerous that they once were, I think. And back in the day, everyone at least tried to aspire to be hard sci-fi (see Frank Herbert - he really tried, despite his scientific shortcomings, and it shows; I daresay a Dune-like book written today would have none of that sci-fi). Now most of what I seem to see are steampunk/bizarro curiosities, political fantasies with little integrity like Honor Harrington books, straight sci-fi war porn or no-sci-fi at all, there's more fantasy/horror than ever before.
Perhaps I am exaggerating but I've recently rewatched the full Stargate series. From quite ingenious (if oftentimes showing lack of actual knowledge) show that wasn't afraid to ask the right questions, to explore, to aspire to find some truth - to the disgrace which is Atlantis, all in the span of 10+ years, and it kinda left me with bad aftertaste.
Robinson is actually pretty good from the scientific point of view, but he sadly fails hard as a psychologist, and even harder as sociologist, making the books pretty much unreadable. Even Arthur C. Clarke's infamously crude characters were way better, by the simple virtue of acting, speaking and thinking like actual humans.