That might be an argument if the only market was for projects like the linked one, which provide drop in replacement for period-accurate replicas, but the market is also full of full FPGA reimplementations and machines that adds all kinds of additional features, which shows there's a substantial portion of the retro community who don't care even about whether the result provides accurate reproductions.

This is not a market for retro, it is a market for replicas, an entirely different one. Still a replica is a replica, and should not be advertised as a brand new original machine, which the original title (before edit) was about.