Satya Nadella: Remote Work Can Feel Like ‘Sleeping at Work’ (bloomberg.com)

When you are working at work, it sometimes feels like you are sleeping at work, too.

The headline is a bit misleading- Satya's actual quote is about work from home specifically, and the lack of boundaries working from home creates. "Sleeping at work" means that because is now work is home with you, you are "at work" all the time.