I think they only test on small demo projects. I believe (since embarcadero) they really focus on quality but they are not very smart when choosing what to do. When trying to optimize code they should choose to remove big bottlenecks that cost minutes before working on code to win milliseconds. They have difficulties priorizing things that for us look obvious. But there is hope, they understood someone is smarter than them and asked permission to integrate some idefixpack fixes ! I told them, "Without IDEFixPack Delphi is llike "Turbo Pascal" without the "Turbo" ! But idefixpack will allways be needed, because it also fixes some breaking bugs that would require months of waiting for an official patch.