Should I opt into strict concurrency checking?

Opting into strict concurrency checking can be highly beneficial for your app. Here are some key points to consider:

1. Data Race Safety: Enabling strict concurrency checking helps catch potential data races at compile time rather than at runtime, which can significantly improve the correctness and safety of your code. This is particularly useful if you're experiencing hard-to-reproduce crashes (Migrate your app to Swift 6).

2. Incremental Adoption: You can enable strict concurrency checking incrementally. Start with simpler targets like the UI layer, which often runs on the main thread and uses APIs that are concurrency-safe (Migrate your app to Swift 6).

3. Handling Warnings: When you first enable strict concurrency checking, you might see a large number of warnings. It's important not to panic. Many of these warnings can be resolved quickly with simple changes, such as marking methods to run on the main actor or making global variables immutable (Migrate your app to Swift 6).

4. Module-by-Module Approach: You can adopt strict concurrency checking on a per-module basis. This allows you to gradually update your codebase and manage the complexity of the changes (What’s new in Swift).

5. Compiler Guidance: The Swift compiler provides guidance on how to resolve concurrency issues, making the process more manageable (Migrate your app to Swift 6).

6. Future-Proofing: Adopting strict concurrency checking prepares your app for future updates and ensures that new features do not introduce concurrency bugs (Migrate your app to Swift 6).

In summary, opting into strict concurrency checking is a good strategy to improve the safety and reliability of your app, especially if you are planning to adopt more concurrency features or if you maintain a public Swift package.