Scaling concerns can be a legitimate reason for a microservice, but I think those scaling concerns should be proven and not assumed before a new microservice is born.

I also hate the agreement of maybe one day we might... as a justification for a new microservice. The number of times that premature optimization didn't pay off is far less than I've seen it come to be.

Microservice should be an exception, not the preferred architectural design pattern.

Sometimes I cynically think system architects like them because they make their diagrams look more important.