Signal Forms: Angular’s best quality of life update in years

Angular Signal Forms, introduced in Angular 21, dramatically simplify reactive form creation and custom control implementation. The old approach required verbose FormGroup/FormControl setups with nullable quirks, confusing error aggregation, and the notoriously complex ControlValueAccessor interface. Signal Forms replace all of this with a simple interface-based schema, a form() function that connects a signal to the form, an errorsSummary for easy validation feedback, and a FormValueControl interface for custom controls that is roughly half the code of the old approach. The data is inherently reactive via signals, eliminating the need for manual onChange/onTouched wiring and reducing boilerplate significantly.