Not me personally but an engineer at my current startup is taking 5 weeks off but the typical "Unlimited Vacation" also mentions as long as you get your work done. So they will be taking 5 weeks off traveling the world, but they are still getting work done (not the typical hours by any means, but getting what needs to be done accomplished).
5 weeks travelling and doing work = 0 weeks vacation. It is really great, it is flextime+great office+telecommuting which are all nice things; but it's apples-and-oranges compared to a vacation.
I mean, all the psych research says that it takes at least 4+ days until people really get work off their mind, and the work-mindset starts a few days before returning. So vacations start to be effective at a minimum of 2 consecutive, uninterrupted weeks (coincidentally a legal requirement in a bunch of countries). If you're taking vacation in small blocks or continue to think about work on vacation, then you and the company lose the working days spent, but aren't getting the expected recovery/productivity/burnout-prevention/etc benefits for which vacations are actually implemented.
Agreed. Working from the beach in Thailand and getting all your work done is no different than working from your house in Oakland and getting all your work done which is no different from working at the coffee shop across the street from work and getting all your work done.
Classifying any of these as "employee is out taking vacation time" is a giant spin.