Org Preferences Deprecation Time Line
Where: This change applies to Lightning Experience, Salesforce Classic, and all versions of the Salesforce app in Developer, Enterprise, Group, and Professional editions.
Why: Have you ever wished that you could spin up a scratch org with a specific org setting only to find out that it wasn’t supported? With scratch org settings, you can configure your scratch orgs with any Metadata API setting. We encourage you to convert org preferences to settings in your scratch org definition files.
How: For assistance converting org preferences to settings, see Scratch Org Definition Configuration Values in the Salesforce DX Developer Guide.