We moved in (renting) when it was brand new, peeling the plastic off the appliances etc. Within 1 year they were doing MAJOR fixes to building-scale defects in the construction, and within 2-3 years we had cracks in the walls, paint flaking off, doors that didn't line up, windows that didn't seal when closed. This is on a ~8th level apartment, and these aren't cheap apartments. They're not luxury, but they're comfortable in the "mid-to-high" end of the Sydney scale, just on the edge of the CBD.
We since moved out of Sydney, but we'll never live in a new-build Apartment again. The hell we went through, just as a renter in those few years, was mind boggling. Giving engineers and tradies access to our apartment seemingly every week, sometimes every day for days on end, so they could inspect and fix issues. I can't even imagine how bad it is for people who got suckered/conned into buying those POS apartments.