Announcement: Deploying SharePoint Framework (SPFx) solutions to all site collections in an SPO tenant at once

[Via Office Dev Center]
Announcing Tenant-Scoped SharePoint Framework Package Deployment
You can use new capabilities released today that provide more options for engaging broader audiences with your SharePoint Framework (SPFx) web parts. We are pleased to announce a new tenant-wide SPFx deployment option, which complements the existing site-collection targeted deployment option. Developers can choose to mark their solution as being ready for tenant-scoped deployment which gives tenant administrators the option to make a SPFx solution and its corresponding parts and extensions immediately available across all site collections in a tenant.
The tenant-scoped deployment option is now generally available across all Office 365 tenants.

You can plan for tenant-wide deployment with newly available documentation and this overview video.
More information can be found in the following article:

• Engage more users with SharePoint Framework Parts and Extensions: Announcing Tenant-Scoped SharePoint Framework Package Deployment