Andy Butland announces that Razor run-time compilation is now obsolete, urging against its use in production. This change affects Umbraco features like the BackOfficeDevelopment runtime mode and InMemoryAuto models builder, which will be removed in Umbraco 19. Users are advised to edit templates as .cshtml views and utilize dotnet watch for hot reload.
Umbraco Models Builder is a vital feature for Umbraco websites, generating "strongly-typed" C# classes that represent Document Types in the CMS. These models enhance development by being utilized in controllers and views. However, each generated class includes the current Umbraco version, which may impact version management.