Families are only young for a few years. Children soon don’t want to be supervised all the time, and like to ‘do their own thing’ without being overheard and ‘shushed’ because someone else is concentrating or busy. People need to have private conversations, particularly older children and teens.
I wouldn’t look at an open plan house myself, but others like them, maybe particularly those with children under ten or so. I agree that you should do what works for you, but if you are concerned about resale being affected, think about who is likely to buy your house, based on price, proximity to schools etc. If the area is attractive to young families or ‘mixed’, you probably have nothing to lose, but on the whole, I think you should live for you in the here and now, not for when you might sell, unless you know that will be happening in the next couple of years.