[joelbluminator]

I don't understand what you mean by "real multithreading". What I understand from Ractor is that it makes it safer to write concurrent code (e.g there are constructs that keep you from mutating shared data). But there is still a global VM lock, or is that gone in Ractor?

[lucraft]

I believe the VM lock is now per-ractor, so no longer global no. Then there are constraints on what can be shared between ractors to ensure safety.