> I would encourage using regular .Net, not .Net Core until they've reached a certain threshold

This is terrible advice. .NET Framework has so many gotchas in its dependency management and binding redirect hell, not to mention ASP.NET 4.x is full of hidden "magic" and serious usability problems.

Anyone starting a new project should be on .NET 5/Core, and that's been true since the Core 2.x releases. Also, the generic hosting model[0] is a productivity game changer and gives you a complete batteries-included experience no matter the project type.

[0] https://docs.microsoft.com/en-us/dotnet/core/extensions/gene...