Add a feature to many plans at once from the feature's Entitlements tab. Each plan can get a different entitlement, and one action copies an entitlement to all of them.

Migration is set per plan. Companies move at the end of the billing period by default, or immediately with the proration you choose. Or keep them on the current version so only new checkouts get the new one. Publishing runs in the background, and the feature's Migrations tab shows each plan's progress.

Docs: Rolling out new plan versions

Live now for every account.