You're right, as of Angular 17, there's no built-in Date-Time picker component. This can be frustrating, especially after years of development with the framework. The `datetime-local` input type, as you've found, doesn't reliably save both date and time in all browsers, and the `date` type only saves the date portion.

While it's true that Angular doesn't provide a built-in Date-Time picker, there are numerous external libraries available that can fulfill this need:

Popular Angular Date-Time Picker Libraries:

* ngx-bootstrap: [https://valor-software.com/ngx-bootstrap/#/?tab=getting-started](https://valor-software.com/ngx-bootstrap/#/?tab=getting-started)
* Offers a wide range of components, including a Datepicker and Timepicker, which can be easily combined for a Date-Time picker.
* Well-documented and integrates seamlessly with Angular.
* ngx-daterangepicker: [https://www.npmjs.com/package/ngx-daterangepicker-material](https://www.npmjs.com/package/ngx-daterangepicker-material)
* Offers a visually appealing Date-Time picker with range selection capabilities.
* Uses Material Design for a consistent look and feel.
* ng-pick-datetime: [https://www.npmjs.com/package/ng-pick-datetime](https://www.npmjs.com/package/ng-pick-datetime)
* Offers a flexible and customizable Date-Time picker, allowing you to tailor its appearance and functionality.
* Extensive documentation and examples.
* Angular Material Datepicker: [https://material.angular.io/components/datepicker/overview](https://material.angular.io/components/datepicker/overview)
* Offers a Material Design-compliant Date-Time picker with excellent accessibility and customization options.

Choosing a Library:

Consider these factors when choosing a library:

* Functionality: What specific features do you need (range selection, time zone support, custom formatting)?
* Appearance: Do you need a specific visual style (Material Design, Bootstrap, custom)?
* Documentation and Support: Is there sufficient documentation and community support for the library?
* Integration: How seamlessly does the library integrate into your existing Angular project?

Your Choice:

The library you've chosen, angular-datepicker, is also a good option. However, make sure to thoroughly review its documentation and features to ensure it meets your requirements.

Remember that using a third-party library can add complexity to your project. It's important to weigh the benefits against the potential drawbacks before making your final decision.