As much as I'd love a new Valve game, why fix what's not broken, financially speaking? Valve/Steam definitely have plenty of other problems that I'd love to see get sorted out, but they're making tons of money.
I would be okay with Valve Time. This isn't them being slow, this is them not making games anymore. There hasn't been a Valve-developed game since 2011 (that's when Dota 2 was released as a beta).
I have an unpopular opinion about Portal 2 that seems relevant here. I just don't think it was that groundbreaking. Sure, it was a fine game, but it felt more like Portal: Episode 1 (in the vein of the HL2 content packs) than it did a proper sequel. I don't recall it adding any truly meaningful/groundbreaking gameplay mechanics. Portal blew my mind the first few times I played it, and I couldn't get enough of it. The only other games within at least the past decade that also did that for me were KSP and Minecraft. Portal 2 just felt like a content pack, with admittedly well fleshed-out characters. Am I missing something? I mean, I guess the coop puzzles were cool.
Now an actual Half-Life 3 in VR, on the other hand ... if executed properly that would literally go into the history books as launching the entire next generation of gaming, more different in kind than even the original transition from sprite-based to truly 3D-rendered environments.
