I remember when Raph was working on Metaplace[1], which was a kid-targeting, programmable (Lua dialect), virtual world/user generated content factory that was contemporary to the launch of Roblox ca. 2006-2007. I wonder quite often what things might be like if Metaplace had gotten to the scale and scope that Roblox wound up achieving.

1: https://www.raphkoster.com/2007/09/18/metaplace/, or this demo https://www.youtube.com/watch?v=tZiB_JcRH_s, or https://en.wikipedia.org/wiki/Metaplace