Migrate a Blazor App With Routable Components in Another Assembly from .NET 8 to .NET 10
Upgrading a Blazor Web App whose pages live in a Razor class library or a .Client project from .NET 8 to .NET 10: what stays the same (both AdditionalAssemblies registrations), and the four things that break, from a 404 on blazor.web.js in thin hosts to NotFoundPage pages that render blank. Measured on ASP.NET Core 8.0.32 and 10.0.10.