Modern Delphi has a simple flag that you can set that will show you a log of every memory leak in your application when you shut it down, and there are 3rd part

Modern Delphi has a simple flag that you can set that will show you a log of every memory leak in your application when you shut it down, and there are 3rd party exception handling and profilers/analyzers that can be purchased for a few hundred dollars that will take care of finding/fixing AVs/performance bottlenecks. It's actually quite easy to create solid and reliable applications using Delphi if you follow solid software development practices.