> In terms of what issues caused us to move away from parallelism in the first place, it was all the CPU-bound stuff that you might expect: ReDoS-style issues, post-processing arrays in very large edge cases, programmer error, etc.
But these are not parallelism problems. These are single threading problems, which the core problem with Node.js, not parallelism in general. Hence I think the question stands: why did you choose node for this?