[anonyfox]

When you come from a legacy ball of mud in written in any language, a rewrite alone brings loads of benefits if done properly. In most cases, the evented design of node requires some re-thinking and forbids simple copy-paste of the old stuff.

In addition, a good chunk of computing is pushed from the server to the clients nowadays, reduces server load even more. Of course, your servers are more idle if they have less to do.

The course of JS is, that it is used in places never thought of. But I just leave it at that.

Finally, I trust a proven tech, that is designed to solve todays performance/distribution/messaging problems and delivered for decades now (elixir/erlang/OTP). Choose by yourself. Yeah, JS nowadays is like lego, you can plug together anything already available, but then, lego is for kids and isn't used for actually mission-critical things in the real world.