LLD status update and performance chart

What is the current status of lld on the Mach-O darwin side of things?
Has the lld code-base effectively forked for that platform from the
ELF ones? I don't see many commits on the Mach-O side of things these
days. Is Apple looking at a different solution than lld for their next
linker? If so, that would be an odd decision considering how Xcode is
replacing all of their other binaries (e.g. llvm-otool, etc) with
those from the llvm code base.

Out of curiosity, why do you think Apple has any interest looking for a new linker while ld64 works very well ?