[jauntywundrkind]

From the redis docs:

  local current
  current = redis.call("incr",KEYS[1])
  if current == 1 then
      redis.call("expire",KEYS[1],1)
  end

https://redis.io/docs/latest/commands/incr/

There's so many valid good & serious reasons why we are so scared, so afraid as engineers. The feeling that chaos grows in around us, the fear of opening doors to complexity we might not be able to return from.

But we also let ourselves be scared of so many ghost tales. Use some Lua! Go ahead! Maybe there are places where being afraid & limiting ourselves makes sense, but for 99% of people: some 'yes we can' attitude is amazing. We are the empowered capable doers, us engineers. Let it rip!

(I do also want a society respectful & deference to the massive complexity of the universe about us. Uncertainty abounds! But it should not be a cudgel.)