It is pretty cool. I’ve been using it for 3-4 years as a queue between Ruby and Node for scraping tasks. Ruby queues the work, a node worker does the downloading, and a Ruby process parses and loads data. It works incredibly well in my use case and has saved me from having to shift everything to one language or the other. It’s been very reliable.

Because people running sidekiq with their Ruby app on production don’t care about cross-language queue. If you pay for Pro or Enterprise you don’t want any major changes that are potentially breaking.