The jokes about Valve's productivity couldn't be aimed at a less appropriate target, it's why it's so funny.
Oldish comment but:
1. Develop and run three of the biggest (PC) games (hundreds of updates since launch per game, one game currently going through a significant engine transition). Two of those games having gigantic player bases. Running major tournaments for two of those games too.
2. Develop and run the biggest PC distribution and gaming platform
3. Developing a new game engine (Source 2) and supporting existing Source
4. Developing a Linux distribution for bringing Steam to the living room.
5. Developing two new hardware devices (Steam controller, Steam Link)
6. General Steam feature development (Big Picture, community features, market, workshop, etc, etc)
7. Developing and supporting SteamVR (supporting HTC Vive, Oculus Rift and others that target OpenVR) - this support includes developing tools for other engines (e.g. Unity) and providing developers with support.
8. Working on VR software like The Lab. It's a collection of mini games and experiences, but given the R&D that probably went into it (developing VR games the way they 'should be done') and overall polish, it probably wasn't a small effort.
9. And on that topic - a reasonable amount of research and other experimental projects (AR, VR, workshop for 'physical items', etc).
This is all excluding unannounced projects.
When you consider Valve is a studio of around 400 people, they're one of the most productive in the industry.
I mean, if you look at other big studios and they really only focus on games, like Bungie who are said to have around 750 employees now, or even smaller ones like Naughty Dog (around 300), pound for pound Valve are punching above their weight.
But yeah... get back to some '''''''actual work'''''''' Valve, you know, stop working on those things other people like and go back to working on things that *I* like!