Explore subscription management in Stripe customer portal

Stripe released few days ago an update that introduce "Update plan", "Cancel Plan" in the prebuilt customer portal.
Explore the features and see if that's help reduce the complexity of our billing page.

Start by reviewing Stripe customer portal's Update plan and Cancel Plan features alongside the current billing page. Compare whether using these features would reduce billing-page complexity, and record a clear recommendation as the completion criterion.

Written by the indexing model from the issue text.