The quality of reddit posts outside of niche communities or events has tanked a lot. Most of the stuff at the top is AITA(H), the most basic questions, and reposts, with some short video clips and the occasional comic. Doesn’t help that it is known that someone is using LLMs for bot accounts.
HL3 is unlikely to ever happen. I can’t see a groundbreaking innovation for the FPS genre in the near future that would meet the incredible expectations for, probably, the most hyped up game at this point in time.
We might get more Half-Life games once we reach the point of uploading your consciousness into the game, or similar. And even then those would be like HL: Alyx. Fun fact: Did you know modern VR headsets have been around for a decade, give or take? And they still aren’t widely adopted.