Regarding CQRS, it is indeed a really interesting concept, and it also allows you to easily scale up. The issue is that it's hard to convince people as they used to the RDBMS day of thinking.
> That could explain why scheduling queue messages has never been a first class citizen in any MQ so far.
Exactly! The concept of CQRS is quite old, but back in the day, it was difficult to challenge Oracle. We are getting back to the fundamentals though..
If you are interested, check this guy; https://www.youtube.com/watch?v=v2RJQELoM6Y&feature=emb_titl...