[const_cast]

Even if it's pretty bursty, usually a perm server is still cheaper. Running the server only half the time isn't burning too much money since AWS is already 10x the cost of raw compute. You need really bursty workloads to make serverless make sense.

[swiftcoder]

If we're talking about relatively small workloads, and relatively stable traffic, then sure.

But I think for large workloads with unpredictable requirements, the capacity planning alone in a perm setup is a nightmare for most early-stage businesses. Spinning up an extra hundred instances in EC2 takes minutes - getting the same number of boxes installed a colocation facility takes weeks at best