Re:Using Lua as a Serialization Format
by zwirbl on Thursday June 18, 2020 @02:06AM
(#23560228)
It's used in CHDK, the Canon custom Firmware Project for user definable scripts
https://chdk.fandom.com/wiki/CHDK
Besides this I've rarely encountered Lua in the wild
Edit: And of course in Magic Lantern, for Canon EOS DSLRs https://magiclantern.fm/