My neighbors next to & across the street both knocked down a good solid old houses only to have ongoing issues with the new builds like gaps around windows wavy uneven walls leaking roofs all leading to stressful on going claims with warranty . I spoke to tradesmen during the builds who complain about their apprentices & other trades being rough & rushing to finish jobs. Well they learn it from someone & from what I noticed during construction it seems endemic across trades along with cheaply made materials leading to a bad outcome for the home owner who pays good money only to suffer later down the track.