When we fitted bi-folds to the back of our lounge, I also took the opportunity to fit matching french doors to the kitchen. The wife insisted on internal blinds in the kitchen doors, she wasn't bothered about the much bigger bi-folds, very strange.
Anyway, the kitchen blinds haven't been shut for years now, I've no real idea why she insisted on them.
We are overlooked, but it's not ever bothered me, and weirdly the wife was only worried about the kitchen, although it's some years ago now, it may have been the cost for doing all of them that put her off doing the lot, glad we didn't.