This is kind of the same argument as microservices.

We could write 30 microservices deployed on 30 docker images with load balancing and FT and all that magic for a basic webapp...

Or we could just write a pretty fast webserver and do it with 1 server. (Or if it is stateless, do it with a few for still a lot less work than a giant microservice cluster).

I think in the last year or so microservices have become a little less cool, and people are more along the lines of "code cleanly so we can microservice if we need to down the road, but don't deploy it like that for 1.0"... seems similar for this.