It advertises interpreter size and RAM requirements front and center on the homepage, so I assume that's the main draw. I'm not super familiar with embedded Lu

It advertises interpreter size and RAM requirements front and center on the homepage, so I assume that's the main draw. I'm not super familiar with embedded Lua but I believe it to require at least an order of magnitude more RAM and codespace than this, even without float support. For my money, Berry is still a bit heavy. On a cheap M0 I'd rather have something with about half the required memory.