I moved into a new build bungalow three years ago. Between getting the key and moving in, I had it independently surveyed so that I could present any potential problems to the snagging team. Nothing serious was found, and the the surveyor judged it to be built to a good standard. The house is very well designed, with regulatory ramp out front, wide doors and a wide and spacious hall. One of the three bedrooms is twelve feet square, as big as the living room in some homes. The smallest has two single beds in it, and a very spacious shower room. The fittings are good quality, and the appliances Siemens. A neighbour found an outlet which was able to supply an extra kitchen cabinet of the same range,and it was not cheap. We have a drive which can take three cars, and a front and back garden, the back being bigger than we would have liked! The living area is very spacious, with a three panel bifold door, plus two floor to ceiling windows. An integral garage, opening from the utility room completes the property. As others have said of new builds, they are well insulated. We have gas underfloor heating.
We were in our last new build for thirty years, and had no problems. The house before that was built about 1970, but was cold within minutes of the heating going off.
DD lives in a Victorian property, which is freezing a lot of the time, and they have spent quite a lot of money on it.
I accept that the new build may well depreciate initially, and it's value will be dependent on the housing market generally.
There are probably pluses and minuses in both old and new. I'm just pointing out that new needn't be poky or flimsy.