Does Netflix have a true "unlimited PTO" policy or do they enforce a minimum PTO usage per year? I've heard of places with unlimited PTO but they require their employees to take a minimum of 2 weeks a year (and strongly, strongly encourage 4-5 weeks a year).
There's no forced PTO, though good managers will encourage you to take it. That's relatively common from what I gather.
I've never had any friction around taking time off, if I was responsible about clearing/delaying/delegating projects and getting my day-to-day work covered.
It's easy to fall in the psychological trap of thinking you never can, sure, but since Netflix pretty much starts at the Senior level for hires (biggest reason they aren't in the first two sections probably) I think it's less of an issue. The fact you see your coworkers taking time off without the world blowing up is also a powerful social cue.
I'd never trust a startup with unlimited PTO, but Netflix actually does mean it.