I use both a separate space and sometimes move to the living room, kitchen or rooftop depending on my activity. Staying in the same room and possibly same position all day is not perfect either. I definitely need that separate office when in full focus mode but usually a working day is not 100% like that, same as in a regular office.
My 9 and 12y old kids are at school until 2pm, I love taking that pause at 2:30 to have lunch with them and then I send them to do their homework. Once they have finished it is either they stay quiet or I kick them out of the house and they have to play in the street for an hour.
You can't avoid all interruptions, like when kids are sometimes fighting which is the moment to be strict.
My 9 and 12y old kids are at school until 2pm, I love taking that pause at 2:30 to have lunch with them and then I send them to do their homework. Once they have finished it is either they stay quiet or I kick them out of the house and they have to play in the street for an hour.
You can't avoid all interruptions, like when kids are sometimes fighting which is the moment to be strict.