What new features and capabilities were added in Dart 3.0, and do you use them in your projects?

Dart 3.0 introduced several important improvements and new features that make the language more modern and developer-friendly:

• Pattern Matching — allows more expressive and concise data handling, for example, with switch statements with conditions and destructuring.
• Enhanced Type System — new capabilities for working with types, including better support for generics and null safety.
• Records — enable grouping multiple values without creating a separate class.
• Sealed Classes — for more strict and safe class hierarchies.

Example of pattern matching and records:

record Point(int x, int y);

void printPoint(Point point) {
  switch (point) {
    case Point(0, 0):
      print('Origin');
      break;
    case Point(var x, var y):
      print('Point at ($x, $y)');
      break;
  }
}

In my projects, I use pattern matching to simplify data processing logic and records for compactly storing related values without creating additional classes.