I am a Googler. I will only speak to my personal experience, and the experience of people around me: 20% time still exists, and is encouraged as a mechanism to explore exciting new ideas without the complexity and cost of a real product. My last three years were spent turning my 20% project into a product, and my job now is spent turning another 20% project into a product. There was never any management pressure from…
Every place I've worked has allowed employees to come in and work weekends on projects that would help the company. I guess those places just weren't innovative (read: arrogant) enough to rebrand it as an employee benefit.