Well, plenty of money has gone into the JVM fast to start. Sure, it's fast to run once warm, making it great for servers, but verifying bytecode and running it

Well, plenty of money has gone into the JVM fast to start. Sure, it's fast to run once warm, making it great for servers, but verifying bytecode and running it is still slow. I've seen benchmarks showing that compiling JS is faster than loading equivalent JVM bytecode. Additionally, the JVM security model has a much larger surface area than JS, allowing for all kinds of things JS doesn't, which, I'm going to guess is why security has been worse.