I didn't handwave it away. I alluded to there being existing solutions CRaC, AoT, GraalVM, etc. There are ways to entirely eliminate cold-start as a concern if it's important to you

My point was you don't ever -need- serverless. You might like it for whatever reason but it's completely unnecessary when long-lived processes can get the job done and have so many benefits. JIT of course but also connection pools, memory-local caches etc that all much much more important than "being on serverless" which is mostly a net-negative once you look at the picture more wholistically.

I also think it's wrong to go "hey I want to use serverless, what works well with serverless?" insted of going "what is the best tool to solve my problem? Ok now what is the best environment for that to run?".