A set of prints is the right call for a wall that has been bare for months, the kind of stretch of hallway or stairwell everyone walks past and nobody has finished because one single picture would look lost up there. If you already have a gallery wall going, or your walls are busy with pattern and shelving and family photos crowding every surface, I would think twice before adding another cluster of frames into the mix. It tends to work best where there is nothing else competing for attention.
The honest limit is that a set only looks finished if the wall is actually big enough to hold it, and if the frames you get are flat and even, not the thin plasticky kind that warp a little in humid rooms. I have hung sets where the hardware on the back felt so light I knew before I even leveled them that they would drift crooked within a month, and they did. Glass fronts catch glare badly in a room that gets strong afternoon sun, so a hallway that floods with light at four in the afternoon is not the place for three or four glossy frames in a row. And moving day with a set is its own small headache, wrapping each one separately, hoping none of the glass cracks in the box, which has happened to me exactly once and was enough to make me buy bubble wrap in bulk after.
Where this really earns a spot is in the rooms people move through rather than sit still in for long, stairwells, entryways, the wall above a console table where coats and keys and school bags land. A long dining room wall works too, especially through the colder months when you want something on the wall that reads as warm and settled rather than stark. Rental apartments benefit enormously, since a set gives you a finished look without committing to a single huge piece you might not want to carry to the next place.
What I like is how a plain set sits against ordinary furniture, a worn wooden console, a bench with coats piled on it, a runner rug underneath that has seen better days. The frames do not need matching furniture to look right, just a wall with enough breathing room and a bit of consistent spacing, which I check with a tape measure every single time because eyeballing it has let me down more than once. Set against something simple, a basket, a stack of mail, a row of hooks, they stop looking like decoration and start looking like part of how the house actually works.
A wall that has been waiting this long deserves something that finally finishes it.