Language-wise, UI design-time lets you execute code such as db queries while designing your screens. It is almost completely orthogonal. It has no GC which makes for a faster runtime and writing free in finally is not something that is easy to forget (remember orthogonal) and immediately jumps out as an error when skimming code. Data modules enforce a separation of concerns, visually seeing component properties enables another form of remembering setup parameters.

Tooling-wise, you have runtime stack traces thanks to jedi library. It can show memory leaks on shutdown by enabling a flag. You have package manager baked into the UI, compiler is blazingly fast and generates fast executables.

With all this, for example, you could concoct a db editor easily in a few hours.