Super interesting, many thanks @sam. It’s true there are tons of comparations out there about what app server to choose when Ruby is in between, and as usual, will depend on how familiar is anyone with it, that obviously can tip the balance to make a decision.
Only fear about this is if you will focus your efforts in Unicorn only and exclusively, in the way that Puma won’t be, not useful but I’d say not well adapted to server Discourse in an optimized way.
I’m wondering if anyone have tried with NGINX Unit…
Many thanks guys! 
Ismael