The .NET source build team looked at subtrees (
https://github.com/dotnet/arcade/issues/10257#issuecomment-1...).
> Introduces a very messy and complex history which would not work for the repo of our size
> Apparently the support in git is buggy and can lead to problems in the repo (the SO is full of examples)
> Doesn't support cloaking
(I think by "cloaking" they are referring to https://github.com/premun/dotnet/blob/766c564dd379e634c38739... )
