Resolved Unity engine in C#

This is might be just a dream the unreachable, but still I'm curious to ask.

C# has some features (unsafe, fixed, nuint type, etc) to work low-level.
Could be considered to rewrite Unity part-by-part in C#?

I'm talking about long-long term, like 5-10 yrs.

 

For this I would like to feedback that official should try to make the feature as full C# as possible since there's burst to get maximum performance and in future we have CoreCLR that make it almost no reason to still write code at C++ land. I think should only write very thin C++ layer code at editor engine when it's not possible to make it full C# due to no C# low level api to integrate. One of the really important area official needs to solve is SRP for graphics rendering. Although SRP already open up a lot of graphics feature to C# but there are still have a couple of crucial features still lock at C++ land. I would like official continue to move more and more C++ land graphics code to C# SRP package and eventually become just very thin C++ layer code to just interact with low level graphics API.