We brought a house 5 years ago, which was then 10 years old.
Like you, in an area more known for its beautiful period properties, this was priced considerably below those properties. We purchased it off a widow with two teenagers who struggled with maintenance, financial and otherwise, of the property since her partner passed away. This definitely did show and the house needed reprinting. She was very honest about one bathroom leaking and the other that was unusable due to flooding. So the property was veery run down for a new build and we replaced bathrooms and kitchens. Turns out the build quality was super poor also. All problems that could be fixed though.
Despite being new, it still has a box room and small pokey rooms with fire doors and lots of toilets (4 for a 4 br house! Seems not uncommon with a new build). Slowly we've been knocking down walls and making it all open plan.
The advantages are warmth! Our house is warm, warm, warm! After living in a 150 yr old house for years, never really feeling cosy, I just love the warmth of the house.
We are a semi, but we don't get much internal noise from next door, only if they are in their garden. The only internal noise we hear is people bounding down the stairs. We were friends with the previous neighbours who said the same for us. Neither could hear each other's dcs.
While I'd ultimately like to live in a beautifully restored period property, new builds have such advantages, ours is also so very cheap to run in comparison!