I have a hobby that takes place in hired halls, anything from village halls to theatres to school halls. I travel and see a lot of venues. Maybe 50-60% now have a unisex (or "m/f/trans" sign, or tweely named such as "whatever you are you can pee here!!") facility. Maybe 10% of those are fully private individual stalls, the rest are a new sign on stalls with holes at the top and the bottom. This is happening in schools in this country I promise you.
One venue I have ever visited was as tequila described. New toilets, floor to ceiling cubicles, designated unisex, frosted glass behind the sinks overlooking the reception area. Allegedly to stop bullying.
All I can say is my personal experience, that I felt very vulnerable using them, I drank less water to try to use them less and i left my hobby early to get back to the hotel to use a better loo. I'm not easily scared, but it would have been very easy for an opportunist to hang around there (and many men did hang around the hand basins chatting or taking their time to dry their hands. After all, men tend to feel less threatened by unisex spaces than women.) and push me into a cubicle with them if nobody else was around. I would have hoped that I'd have screamed blue murder but a common distress response, particularly in women is to freeze. It's a threat and opportunity that isn't present in single sex loos. Very few women fear sexual assault from other women. We do fear it from men.