I think it really depends on the style and look that you want to achieve in your house - you should never give someone the advice to use wallpaper without knowing their design aesthetic. With that being said, I think that wallpaper is a lovely touch in older heritage listed home, because you can add the modern touch through it to the home, depending on the pattern.

There are some beautiful patterns around, even from the seventies. As long as you dont clad the entire walls and ceiling in wood panels i think the 70s has some parts worth retaining.

I see wallpapered ceilings a bit in photos. See example. I can't imagine that would be easy to do! An application I did like was wallpaper between dark painted rafters. It was really effective. I don't envy the person who had to do that job. Or anyone who wants to remove it later. In my previous home, every room had been wallpapered sometime in the 80's. All bedrooms, hallway, living room, kitchen, bathroom, toilet. Quite a process to remove! I don't mind wallpaper but I didn't like the ones in that home. I think wallpaper can work really well in homes with a grander scale. High ceilings, architectural trims etc. In smaller homes, a restrained use is more appropriate IMO.

All depends on your style as to what would look good, minimalist, mid century modern, Japandi, coastal, boho, cozy , find something that flows with the rest of your house.