good to hear there'll be a hosted version. AFAICT Fivetran invested a lot in building a scalable infra (using only log replication for reliability purposes), and one of the core building blocks (massively-scalable, reliable, cost effective messaging system) is now available off the shelf.
Coupled maybe with GKE kNative, it seems like the building blocks are there without needing a massive amount of devops. Although I haven't actually researched Fivetran/Stitch's stack to know what makes sense/doesn't.
https://streamnative.io/