Thanks for weighing in and sharing this feedback AlmoEnd!
Based on the insightful input from conversations like this thread, we have revisited PIN unlock options with the 1Password mobile apps. There have been some particularly compelling points raised around accessibility and in other areas. Messaging to help highlight potential risks of PIN unlock will be included and there are limitations to how this feature can be used compared to biometric or password unlock.
To your second point, we're always working to keep the 1Password apps up to date with any OS changes and to make use of new options that become available to help ensure their security. The team here is also intent on iterating and optimizing on features like PIN unlock to find a balance between security and convenience for 1Password users. Thanks again!