REST API deprecation

Can I still use REST API for Product, Inventory, Order and Shipment endpoints after 1st april 2025 for our old custom apps and new custom apps. Just need to confirm as we are in migrating to use Graph QL but that may take more time for full migration to Graph QL

No.
You can’t use REST API for Product endpoints after April 2025 for old custom apps and new custom apps.

More info here

It is saying deprecation, generally deprecation means its usable. Or does that mean it will not return any response or throw error from 1st april ?