"...it doesn't do any real work in parallel." I think this is the biggest selling point.

Although, "with GNU ld you might have to wait several minutes of link time on every dev build." Meh, I might prefer to wait a few minutes and stick with something I know works.

"The creator of mold is also the original creator of LLVM lld" That's cool, why not implement these features in LLVM lld? Why not implement them in GNU ld? Is it a gatekeeping thing? Parallel ld would be very useful.

Also, why Rust?