Hi @Jords,
Welcome to Auth0 Community 
and thanks for appreciating my article 
.
There’s nothing wrong with your approach. Actually, ASP.NET Core APIs and web applications don’t require any specific code tweak to migrate to .NET 5.0. For this kind of application, the benefits of migrating are under the hood (mainly performance).
Blazor applications are the most impacted ones by the migration (see this document for more details)