I stumbled upon this re-imagined look for Demon Slayer in the ornate style of 1980’s and 1990’s anime, and it’s a dream. I enjoy Demon Slayer fine, but younger generations really have no idea what beauty they missed from old anime. Producers should really really look into making OVAs in this style.
[for some reason, I’m unable to embed?]

According to GlitchVerse comment, the song used in the video was done with AI and it’s titled Endless Struggle; featured on their channel. It is not mentioned what tools they used for generating the graphics.