PHP 7.4 was released. Yii can benefit from new features:
- Typed properties - would simplify checks overall and will make code stricter. Potentially we can adopt typed DTOs.
- Limited return type covariance and argument type contravariance - would allow to seamlessly add types for PSR interfaces (may not be needed since PHP-FIG is planning to update interfaces).
- Ability to throw
__toString()exceptions - would simplify error handler and make widgets more reliable.
There's a poll about upping minimum required version for Yii 3.