The last time I had to choose between using mpm_worker and mpm_event, it was my understanding that mpm_event was functionally equivalent to just using mpm_worker if SSL was enabled and so it couldn't necessarily be trusted to scale any better.
Has this changed? If I use Apache with mpm_event and SSL enabled and expose a node/express web service via proxy pass through, and the node endpoint takes like 5 seconds to generate a response, will mpm_event benefit from node's event-driven nature moreso than mpm_worker would?