I believe this got fixed in .NET 5; now only native libraries need to be extracted and stored elsewhere on disk, and many applications can get by without native dependencies.

> When the app starts, the managed DLLs are extracted and loaded in memory, avoiding the extraction to a folder.

https://learn.microsoft.com/en-us/dotnet/core/deploying/sing...

It doesn't extract onto disk, I'm not sure if it is still doing some extraction into memory.