We're living in a world of frivolous take-down demands, where the law says shoot first, ask questions later, and all the power is concentrated with the copyright mafia. (How meta.)

Retro games are highly lucrative. They don't want any competition to remasters and rereleases, which require a new purchase. Nintendo has been doing this "release the same game every 5-10 years" bs since the Wii (ironically often using ROMs found on the internet).