Hi Igneous01,
Bazel support does not replace the CLI. The CLI uses Bazel to deliver better performance in larger projects (for small ones, it's not really helping. Yet!)
Webpack is still used in the Bazel setup.
Experiments are being done to see if Rollup will deliver a better end-product. Again on the inside part of the CLI.
The whole idea about the CLI is that you don't really have to worry about the tooling you need to build Angular apps. What the CLI uses under the hood, is not really a concern. There are NO plans to deprecate the CLI.
What it uses, might change over time, and if it changes it will deliver more speed and/or smaller payloads. Also adding things like better bundling for Angular elements is on the agenda.
Regards
Sander