White dining tables show every single thing you put near them, and I mean everything. Red wine ring, dark coffee mug left for ten minutes, a kid's marker that "definitely came off the paper." If you've got a white top without some kind of sealed or lacquered finish, you're signing up for a lot of wiping and a little bit of swearing. And yet I still think they're worth it, because nothing else makes a room feel lighter or bigger, especially a dining space that doesn't get much natural light to begin with.
Where they go wrong is next to anything else bright white but a slightly different shade, because then you get two whites fighting each other and it reads less like a clean room and more like two different leftover paint cans. Same goes for a glossy white table paired with glossy white chairs, it starts to feel like a dentist's waiting room, all hard surfaces and nowhere for your eye to rest. What they actually sit well with is warmth and texture working against them, a wood chair seat, a woven rug underneath, black or brass legs, even a slightly mismatched set of vintage chairs that don't match the table or each other. That contrast is what makes the white look intentional instead of just unfinished. A pendant light with some color or shape to it does a lot of heavy lifting too, since the table itself is basically a blank canvas and wants something to anchor the room.
These work best in smaller dining rooms or open plan kitchens where you need the space to breathe, and they're especially good in rentals or starter homes where the walls might be a landlord beige you didn't choose and can't paint. Brighter rooms love them, obviously, but I'd be careful in a north facing room with grey light, because a cool white table under grey light can go a bit clinical and cold rather than fresh. Older homes with some character, wood floors, crown molding, benefit from the contrast too, it keeps the room from feeling too heavy or too traditional. In a shop, run your hand flat across the top and check for a slightly raised texture or a seam, that usually means veneer rather than a solid painted surface, and ask what the finish actually is, because "white" and "white lacquer that survives a Tuesday night dinner" are two very different promises. Measure your doorway and stairwell before you fall in love with a big one, because a table that looks fine in a showroom can turn into a genuine ordeal on moving day.