Right, but an integration of a dotnet like this is going to need to be maintained across versions, and 2021 is just 6 months from now. It is unlikely that a big version increment like this will be less than painful for such an integration, while standard code bases of C++ code probably will have relatively straight forward upgrade paths, though not necessarily trivial.

So if you want to use Unreal, consider just learning C++ as you go. That's my only point.